<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"
        xmlns:xhtml="http://www.w3.org/1999/xhtml"
        xmlns:video="http://www.google.com/schemas/sitemap-video/1.1"
        xmlns:image="http://www.google.com/schemas/sitemap-image/1.1">
    
    <url>
        <loc>https://fr.khanacademy.org/math/3eme-annee-secondaire/xd903d14ae2b1276e:algebre-systemes-d-equations/xd903d14ae2b1276e:resolution-par-substitution/v/solving-systems-with-substitution</loc>
        
        <xhtml:link rel="alternate" hreflang="bg"
                    href="https://bg.khanacademy.org/math/9-klas/xee41df55c1c831f0:sistemi-lineyni-uravneniya-s-dve-neizvestni/xee41df55c1c831f0:uvod-sistemi-lineyni-uravneniya-s-dve-neizvestni/v/solving-systems-with-substitution" />
        
        <xhtml:link rel="alternate" hreflang="bn"
                    href="https://bn.khanacademy.org/math/algebra-basics/alg-basics-systems-of-equations/alg-basics-solving-systems-with-substitution/v/solving-systems-with-substitution" />
        
        <xhtml:link rel="alternate" hreflang="cs"
                    href="https://cs.khanacademy.org/math/9-trida/x4e76afc81ecf6617:soustavy-rovnic/x4e76afc81ecf6617:reseni-soustav-rovnic-dosazovaci-metodou/v/solving-systems-with-substitution" />
        
        <xhtml:link rel="alternate" hreflang="da"
                    href="https://da.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations/x2f8bb11595b61c86:solving-systems-of-equations-with-substitution/v/solving-systems-with-substitution" />
        
        <xhtml:link rel="alternate" hreflang="de"
                    href="https://de.khanacademy.org/math/algebra-home/alg-system-of-equations/alg-solving-systems-of-equations-with-substitution/v/solving-systems-with-substitution" />
        
        <xhtml:link rel="alternate" hreflang="en"
                    href="https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations/x2f8bb11595b61c86:solving-systems-of-equations-with-substitution/v/solving-systems-with-substitution" />
        
        <xhtml:link rel="alternate" hreflang="es"
                    href="https://es.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations/x2f8bb11595b61c86:solving-systems-of-equations-with-substitution/v/solving-systems-with-substitution" />
        
        <xhtml:link rel="alternate" hreflang="fr"
                    href="https://fr.khanacademy.org/math/3eme-annee-secondaire/xd903d14ae2b1276e:algebre-systemes-d-equations/xd903d14ae2b1276e:resolution-par-substitution/v/solving-systems-with-substitution" />
        
        <xhtml:link rel="alternate" hreflang="gu"
                    href="https://gu.khanacademy.org/math/algebra-basics/alg-basics-systems-of-equations/alg-basics-solving-systems-with-substitution/v/solving-systems-with-substitution" />
        
        <xhtml:link rel="alternate" hreflang="hu"
                    href="https://hu.khanacademy.org/math/az-algebra-alapjai/x17cf222d75f5bcf0:egyenletrendszerek/x17cf222d75f5bcf0:egyenletrendszerek-megoldasa-a-behelyettesito-modszerrel/v/solving-systems-with-substitution" />
        
        <xhtml:link rel="alternate" hreflang="hy"
                    href="https://hy.khanacademy.org/math/algebra/systems-of-linear-equations/solving-systems-of-equations-with-substitution/v/solving-systems-with-substitution" />
        
        <xhtml:link rel="alternate" hreflang="ka"
                    href="https://ka.khanacademy.org/math/algebra/systems-of-linear-equations/solving-systems-of-equations-with-substitution/v/solving-systems-with-substitution" />
        
        <xhtml:link rel="alternate" hreflang="kk"
                    href="https://kk.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations/x2f8bb11595b61c86:solving-systems-of-equations-with-substitution/v/solving-systems-with-substitution" />
        
        <xhtml:link rel="alternate" hreflang="ko"
                    href="https://ko.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations/x2f8bb11595b61c86:solving-systems-of-equations-with-substitution/v/solving-systems-with-substitution" />
        
        <xhtml:link rel="alternate" hreflang="pl"
                    href="https://pl.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations/x2f8bb11595b61c86:solving-systems-of-equations-with-substitution/v/solving-systems-with-substitution" />
        
        <xhtml:link rel="alternate" hreflang="pt"
                    href="https://pt.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations/x2f8bb11595b61c86:solving-systems-of-equations-with-substitution/v/solving-systems-with-substitution" />
        
        <xhtml:link rel="alternate" hreflang="pt-pt"
                    href="https://pt-pt.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations/x2f8bb11595b61c86:solving-systems-of-equations-with-substitution/v/solving-systems-with-substitution" />
        
        <xhtml:link rel="alternate" hreflang="sgn-us"
                    href="https://sgn-us.khanacademy.org/math/algebra-basics/alg-basics-systems-of-equations/alg-basics-solving-systems-with-substitution/v/solving-systems-with-substitution" />
        
        <xhtml:link rel="alternate" hreflang="sr"
                    href="https://sr.khanacademy.org/math/algebra/systems-of-linear-equations/solving-systems-of-equations-with-substitution/v/solving-systems-with-substitution" />
        
        <xhtml:link rel="alternate" hreflang="tr"
                    href="https://tr.khanacademy.org/math/algebra/systems-of-linear-equations/solving-systems-of-equations-with-substitution/v/solving-systems-with-substitution" />
        
        <xhtml:link rel="alternate" hreflang="uk"
                    href="https://uk.khanacademy.org/math/7-klas/x035ef06b16a9ec90:sistemi-lninih-rvnyan/x035ef06b16a9ec90:rozvyazuvannya-sistem-lninih-rvnyan-metodom-pdstanovki/v/solving-systems-with-substitution" />
        
        <xhtml:link rel="alternate" hreflang="uz"
                    href="https://uz.khanacademy.org/math/algebra/systems-of-linear-equations/solving-systems-of-equations-with-substitution/v/solving-systems-with-substitution" />
        
        <xhtml:link rel="alternate" hreflang="vi"
                    href="https://vi.khanacademy.org/math/toan-lop-9-viet-nam/xe71e73aeedaeaf4a:phuong-trinh-va-he-phuong-trinh-bac-nhat-toan-lop-9/xe71e73aeedaeaf4a:giai-bai-toan-bang-cach-lap-he-phuong-trinh-bac-nhat-hai-an-toan-lop-9/v/solving-systems-with-substitution" />
        
        <xhtml:link rel="alternate" hreflang="zh-hans"
                    href="https://zh.khanacademy.org/math/algebra/systems-of-linear-equations/solving-systems-of-equations-with-substitution/v/solving-systems-with-substitution" />
        
        <lastmod>2021-04-18T09:25:44Z</lastmod>
        
        <PageMap xmlns="http://www.google.com/schemas/sitemap-pagemap/1.0">
            <DataObject type="document" id="solving-systems-with-substitution">
            <Attribute name="title">L&#39;oiseau magique résout les systèmes d&#39;équations par substitution</Attribute>
            <Attribute name="description">Pour résoudre un système par substitution...&#xA;1.Dans l&#39;une des équations, on exprime l&#39;une des variables en fonction de l&#39;autre, e.g. si 2x+y=3 alors y=3-2x.&#xA;2. On remplace cette variable par l&#39;expression trouvée dans l&#39;autre équation, e.g. x+2y=5 devient x+2(3-2x)=5.&#xA;3. On résout l&#39;équation obtenue et on peut finalement en déduire le couple solution (s&#39;il existe).&#xA;</Attribute>
            <Attribute name="author">Sal Khan</Attribute>
            <Attribute name="type">video</Attribute>
            
            </DataObject>
        </PageMap>
        
        <video:video>
            <video:thumbnail_loc>https://cdn.kastatic.org/googleusercontent/WFPUyv4Z65vD5DDKfQDmETlkFwVvjIApANcxoJ1brGA5Ov6_-mJYCK1T3gdsSAdyFhQ3yT4i4PDoXd77JMOaBo2a</video:thumbnail_loc>
            <video:title>L&#39;oiseau magique résout les systèmes d&#39;équations par substitution</video:title>
            <video:description>Pour résoudre un système par substitution...&#xA;1.Dans l&#39;une des équations, on exprime l&#39;une des variables en fonction de l&#39;autre, e.g. si 2x+y=3 alors y=3-2x.&#xA;2. On remplace cette variable par l&#39;expression trouvée dans l&#39;autre équation, e.g. x+2y=5 devient x+2(3-2x)=5.&#xA;3. On résout l&#39;équation obtenue et on peut finalement en déduire le couple solution (s&#39;il existe).&#xA;</video:description>
            <video:player_loc>https://cdn.kastatic.org/ka-youtube-converted/7Gi7GI8P9UQ.mp4/7Gi7GI8P9UQ.mp4</video:player_loc>
            <video:duration>321</video:duration>
            <video:category>Résolution par substitution</video:category>
        </video:video>
        
    </url>
    
    <url>
        <loc>https://fr.khanacademy.org/math/3eme-annee-secondaire/xd903d14ae2b1276e:algebre-systemes-d-equations/xd903d14ae2b1276e:resolution-par-substitution/a/systems-of-equations-with-substitution</loc>
        
        <xhtml:link rel="alternate" hreflang="az"
                    href="https://az.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/a/systems-of-equations-with-substitution" />
        
        <xhtml:link rel="alternate" hreflang="bg"
                    href="https://bg.khanacademy.org/math/9-klas/xee41df55c1c831f0:sistemi-lineyni-uravneniya-s-dve-neizvestni/xee41df55c1c831f0:sistemi-lineini-uravneniya-s-dve-neizvestni-reshavane-chrez-zamestvane/a/systems-of-equations-with-substitution" />
        
        <xhtml:link rel="alternate" hreflang="da"
                    href="https://da.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/a/systems-of-equations-with-substitution" />
        
        <xhtml:link rel="alternate" hreflang="de"
                    href="https://de.khanacademy.org/math/9te-10te-klasse-mathematik/xf1b287ae05c7bfd9:gleichungssysteme/xf1b287ae05c7bfd9:gleichungssysteme-losen-durch-substitution/a/systems-of-equations-with-substitution" />
        
        <xhtml:link rel="alternate" hreflang="el"
                    href="https://el.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/a/systems-of-equations-with-substitution" />
        
        <xhtml:link rel="alternate" hreflang="en"
                    href="https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/a/systems-of-equations-with-substitution" />
        
        <xhtml:link rel="alternate" hreflang="es"
                    href="https://es.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/a/systems-of-equations-with-substitution" />
        
        <xhtml:link rel="alternate" hreflang="fr"
                    href="https://fr.khanacademy.org/math/3eme-annee-secondaire/xd903d14ae2b1276e:algebre-systemes-d-equations/xd903d14ae2b1276e:resolution-par-substitution/a/systems-of-equations-with-substitution" />
        
        <xhtml:link rel="alternate" hreflang="ja"
                    href="https://ja.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/a/systems-of-equations-with-substitution" />
        
        <xhtml:link rel="alternate" hreflang="ka"
                    href="https://ka.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/a/systems-of-equations-with-substitution" />
        
        <xhtml:link rel="alternate" hreflang="ko"
                    href="https://ko.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/a/systems-of-equations-with-substitution" />
        
        <xhtml:link rel="alternate" hreflang="pl"
                    href="https://pl.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/a/systems-of-equations-with-substitution" />
        
        <xhtml:link rel="alternate" hreflang="pt"
                    href="https://pt.khanacademy.org/math/pre-algebra/xb4832e56:systems-of-equations/xb4832e56:solving-systems-with-substitution/a/systems-of-equations-with-substitution" />
        
        <xhtml:link rel="alternate" hreflang="pt-pt"
                    href="https://pt-pt.khanacademy.org/math/pre-algebra/xb4832e56:systems-of-equations/xb4832e56:solving-systems-with-substitution/a/systems-of-equations-with-substitution" />
        
        <xhtml:link rel="alternate" hreflang="tr"
                    href="https://tr.khanacademy.org/math/pre-algebra/xb4832e56:systems-of-equations/xb4832e56:solving-systems-with-substitution/a/systems-of-equations-with-substitution" />
        
        <xhtml:link rel="alternate" hreflang="uk"
                    href="https://uk.khanacademy.org/math/pre-algebra/xb4832e56:systems-of-equations/xb4832e56:solving-systems-with-substitution/a/systems-of-equations-with-substitution" />
        
        <xhtml:link rel="alternate" hreflang="vi"
                    href="https://vi.khanacademy.org/math/toan-lop-9-viet-nam/xe71e73aeedaeaf4a:phuong-trinh-va-he-phuong-trinh-bac-nhat-toan-lop-9/xe71e73aeedaeaf4a:giai-he-phuong-trinh-bac-nhat-hai-an-bang-phuong-phap-the-toan-lop-9/a/systems-of-equations-with-substitution" />
        
        <xhtml:link rel="alternate" hreflang="zh-hans"
                    href="https://zh.khanacademy.org/math/pre-algebra/xb4832e56:systems-of-equations/xb4832e56:solving-systems-with-substitution/a/systems-of-equations-with-substitution" />
        
        <lastmod>2021-04-29T13:03:19Z</lastmod>
        
        <PageMap xmlns="http://www.google.com/schemas/sitemap-pagemap/1.0">
            <DataObject type="document" id="systems-of-equations-with-substitution">
            <Attribute name="title">La méthode par substitution</Attribute>
            <Attribute name="description">La méthode expliquée à travers de nombreux exemples.</Attribute>
            
            <Attribute name="type">article</Attribute>
            
            </DataObject>
        </PageMap>
        
    </url>
    
    <url>
        <loc>https://fr.khanacademy.org/math/3eme-annee-secondaire/xd903d14ae2b1276e:algebre-systemes-d-equations/xd903d14ae2b1276e:resolution-par-substitution/v/solving-systems-by-substitution-3</loc>
        
        <xhtml:link rel="alternate" hreflang="az"
                    href="https://az.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/solving-systems-by-substitution-3" />
        
        <xhtml:link rel="alternate" hreflang="bg"
                    href="https://bg.khanacademy.org/math/9-klas/xee41df55c1c831f0:sistemi-lineyni-uravneniya-s-dve-neizvestni/xee41df55c1c831f0:sistemi-lineini-uravneniya-s-dve-neizvestni-reshavane-chrez-zamestvane/v/solving-systems-by-substitution-3" />
        
        <xhtml:link rel="alternate" hreflang="da"
                    href="https://da.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/solving-systems-by-substitution-3" />
        
        <xhtml:link rel="alternate" hreflang="de"
                    href="https://de.khanacademy.org/math/9te-10te-klasse-mathematik/xf1b287ae05c7bfd9:gleichungssysteme/xf1b287ae05c7bfd9:gleichungssysteme-losen-durch-substitution/v/solving-systems-by-substitution-3" />
        
        <xhtml:link rel="alternate" hreflang="el"
                    href="https://el.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/solving-systems-by-substitution-3" />
        
        <xhtml:link rel="alternate" hreflang="en"
                    href="https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/solving-systems-by-substitution-3" />
        
        <xhtml:link rel="alternate" hreflang="es"
                    href="https://es.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/solving-systems-by-substitution-3" />
        
        <xhtml:link rel="alternate" hreflang="fr"
                    href="https://fr.khanacademy.org/math/3eme-annee-secondaire/xd903d14ae2b1276e:algebre-systemes-d-equations/xd903d14ae2b1276e:resolution-par-substitution/v/solving-systems-by-substitution-3" />
        
        <xhtml:link rel="alternate" hreflang="hy"
                    href="https://hy.khanacademy.org/math/naxapatrastvir-10-rd-dasaranin/xb3fe689809091384:naxapatrastvir-havasarumneri-ev-anhavasarumneri-hamakarger-lucelun/xb3fe689809091384:gcayin-havasarumneri-hamakarger/v/solving-systems-by-substitution-3" />
        
        <xhtml:link rel="alternate" hreflang="ja"
                    href="https://ja.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/solving-systems-by-substitution-3" />
        
        <xhtml:link rel="alternate" hreflang="ka"
                    href="https://ka.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/solving-systems-by-substitution-3" />
        
        <xhtml:link rel="alternate" hreflang="ko"
                    href="https://ko.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/solving-systems-by-substitution-3" />
        
        <xhtml:link rel="alternate" hreflang="pl"
                    href="https://pl.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/solving-systems-by-substitution-3" />
        
        <xhtml:link rel="alternate" hreflang="pt"
                    href="https://pt.khanacademy.org/math/pre-algebra/xb4832e56:systems-of-equations/xb4832e56:solving-systems-with-substitution/v/solving-systems-by-substitution-3" />
        
        <xhtml:link rel="alternate" hreflang="pt-pt"
                    href="https://pt-pt.khanacademy.org/math/pre-algebra/xb4832e56:systems-of-equations/xb4832e56:solving-systems-with-substitution/v/solving-systems-by-substitution-3" />
        
        <xhtml:link rel="alternate" hreflang="tr"
                    href="https://tr.khanacademy.org/math/pre-algebra/xb4832e56:systems-of-equations/xb4832e56:solving-systems-with-substitution/v/solving-systems-by-substitution-3" />
        
        <xhtml:link rel="alternate" hreflang="uk"
                    href="https://uk.khanacademy.org/math/pre-algebra/xb4832e56:systems-of-equations/xb4832e56:solving-systems-with-substitution/v/solving-systems-by-substitution-3" />
        
        <xhtml:link rel="alternate" hreflang="vi"
                    href="https://vi.khanacademy.org/math/toan-lop-9-viet-nam/xe71e73aeedaeaf4a:phuong-trinh-va-he-phuong-trinh-bac-nhat-toan-lop-9/xe71e73aeedaeaf4a:giai-he-phuong-trinh-bac-nhat-hai-an-bang-phuong-phap-the-toan-lop-9/v/solving-systems-by-substitution-3" />
        
        <xhtml:link rel="alternate" hreflang="zh-hans"
                    href="https://zh.khanacademy.org/math/pre-algebra/xb4832e56:systems-of-equations/xb4832e56:solving-systems-with-substitution/v/solving-systems-by-substitution-3" />
        
        <lastmod>2021-02-08T09:07:16Z</lastmod>
        
        <PageMap xmlns="http://www.google.com/schemas/sitemap-pagemap/1.0">
            <DataObject type="document" id="solving-systems-by-substitution-3">
            <Attribute name="title">Résoudre par substitution le système 9x+3y=15 et y-x=5</Attribute>
            <Attribute name="description">On résout par substitution le système de 2 équations du 1er degré à deux inconnues :  9x + 3y = 15 et y - x = 5</Attribute>
            <Attribute name="author">Sal Khan</Attribute>
            <Attribute name="type">video</Attribute>
            
            </DataObject>
        </PageMap>
        
        <video:video>
            <video:thumbnail_loc>https://cdn.kastatic.org/googleusercontent/bjP0YUSguKZ4ydkR-05lY2SFTE0zKYhnOV3tUWIukcLprjjA5vR9ngfLnBpp1Myuh6EPOZhCdmeSeqqXAw2FztpiUQ</video:thumbnail_loc>
            <video:title>Résoudre par substitution le système 9x+3y=15 et y-x=5</video:title>
            <video:description>On résout par substitution le système de 2 équations du 1er degré à deux inconnues :  9x + 3y = 15 et y - x = 5</video:description>
            <video:player_loc>https://cdn.kastatic.org/ka-youtube-converted/xecArAptRUg.mp4/xecArAptRUg.mp4</video:player_loc>
            <video:duration>364</video:duration>
            <video:category>Résolution par substitution</video:category>
        </video:video>
        
    </url>
    
    <url>
        <loc>https://fr.khanacademy.org/math/3eme-annee-secondaire/xd903d14ae2b1276e:algebre-systemes-d-equations/xd903d14ae2b1276e:resolution-par-substitution/v/solving-linear-systems-by-substitution</loc>
        
        <xhtml:link rel="alternate" hreflang="bg"
                    href="https://bg.khanacademy.org/math/algebra-home/alg-system-of-equations/alg-solving-systems-of-equations-with-substitution/v/solving-linear-systems-by-substitution" />
        
        <xhtml:link rel="alternate" hreflang="en"
                    href="https://www.khanacademy.org/math/algebra-home/alg-system-of-equations/alg-solving-systems-of-equations-with-substitution/v/solving-linear-systems-by-substitution" />
        
        <xhtml:link rel="alternate" hreflang="es"
                    href="https://es.khanacademy.org/math/algebra-home/alg-system-of-equations/alg-solving-systems-of-equations-with-substitution/v/solving-linear-systems-by-substitution" />
        
        <xhtml:link rel="alternate" hreflang="fr"
                    href="https://fr.khanacademy.org/math/3eme-annee-secondaire/xd903d14ae2b1276e:algebre-systemes-d-equations/xd903d14ae2b1276e:resolution-par-substitution/v/solving-linear-systems-by-substitution" />
        
        <xhtml:link rel="alternate" hreflang="ka"
                    href="https://ka.khanacademy.org/math/algebra-home/alg-system-of-equations/alg-solving-systems-of-equations-with-substitution/v/solving-linear-systems-by-substitution" />
        
        <xhtml:link rel="alternate" hreflang="pl"
                    href="https://pl.khanacademy.org/math/algebra-home/alg-system-of-equations/alg-solving-systems-of-equations-with-substitution/v/solving-linear-systems-by-substitution" />
        
        <xhtml:link rel="alternate" hreflang="pt"
                    href="https://pt.khanacademy.org/math/algebra-home/alg-system-of-equations/alg-solving-systems-of-equations-with-substitution/v/solving-linear-systems-by-substitution" />
        
        <xhtml:link rel="alternate" hreflang="pt-pt"
                    href="https://pt-pt.khanacademy.org/math/8ano/x3078d205bb757e91:algebra-equacoes/x3078d205bb757e91:resolucao-de-sistemas-de-equacoes/v/solving-linear-systems-by-substitution" />
        
        <xhtml:link rel="alternate" hreflang="tr"
                    href="https://tr.khanacademy.org/math/9-sinif/xb0a54780f151bbed:3-unite-denklem-ve-esitsizlikler/xb0a54780f151bbed:birinci-dereceden-denklem-ve-esitsizlik/v/solving-linear-systems-by-substitution" />
        
        <lastmod>2020-12-23T14:32:21Z</lastmod>
        
        <PageMap xmlns="http://www.google.com/schemas/sitemap-pagemap/1.0">
            <DataObject type="document" id="solving-linear-systems-by-substitution">
            <Attribute name="title">Résolution d&#39;un système par substitution</Attribute>
            <Attribute name="description">.</Attribute>
            <Attribute name="author">Sal Khan</Attribute>
            <Attribute name="type">video</Attribute>
            
            </DataObject>
        </PageMap>
        
        <video:video>
            <video:thumbnail_loc>https://cdn.kastatic.org/googleusercontent/7U6jJC5K9nrAq0ApLySjXBQ0l99yAgxdH7IprsnTAFPJjZWvmOiJEfRKSM7k10JNF8NI8p_Gyx4PG02CwOMIitpj</video:thumbnail_loc>
            <video:title>Résolution d&#39;un système par substitution</video:title>
            <video:description>.</video:description>
            <video:player_loc>https://cdn.kastatic.org/ka-youtube-converted/DVWUsXBuAv8.mp4/DVWUsXBuAv8.mp4</video:player_loc>
            <video:duration>561</video:duration>
            <video:category>Résolution par substitution</video:category>
        </video:video>
        
    </url>
    
    <url>
        <loc>https://fr.khanacademy.org/math/3eme-annee-secondaire/xd903d14ae2b1276e:algebre-systemes-d-equations/xd903d14ae2b1276e:resolution-par-substitution/v/the-substitution-method</loc>
        
        <xhtml:link rel="alternate" hreflang="az"
                    href="https://az.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/the-substitution-method" />
        
        <xhtml:link rel="alternate" hreflang="bg"
                    href="https://bg.khanacademy.org/math/9-klas/xee41df55c1c831f0:sistemi-lineyni-uravneniya-s-dve-neizvestni/xee41df55c1c831f0:sistemi-lineini-uravneniya-s-dve-neizvestni-reshavane-chrez-zamestvane/v/the-substitution-method" />
        
        <xhtml:link rel="alternate" hreflang="da"
                    href="https://da.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/the-substitution-method" />
        
        <xhtml:link rel="alternate" hreflang="de"
                    href="https://de.khanacademy.org/math/9te-10te-klasse-mathematik/xf1b287ae05c7bfd9:gleichungssysteme/xf1b287ae05c7bfd9:gleichungssysteme-losen-durch-substitution/v/the-substitution-method" />
        
        <xhtml:link rel="alternate" hreflang="el"
                    href="https://el.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/the-substitution-method" />
        
        <xhtml:link rel="alternate" hreflang="en"
                    href="https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/the-substitution-method" />
        
        <xhtml:link rel="alternate" hreflang="es"
                    href="https://es.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/the-substitution-method" />
        
        <xhtml:link rel="alternate" hreflang="fr"
                    href="https://fr.khanacademy.org/math/3eme-annee-secondaire/xd903d14ae2b1276e:algebre-systemes-d-equations/xd903d14ae2b1276e:resolution-par-substitution/v/the-substitution-method" />
        
        <xhtml:link rel="alternate" hreflang="hy"
                    href="https://hy.khanacademy.org/math/naxapatrastvir-10-rd-dasaranin/xb3fe689809091384:naxapatrastvir-havasarumneri-ev-anhavasarumneri-hamakarger-lucelun/xb3fe689809091384:gcayin-havasarumneri-hamakarger/v/the-substitution-method" />
        
        <xhtml:link rel="alternate" hreflang="ja"
                    href="https://ja.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/the-substitution-method" />
        
        <xhtml:link rel="alternate" hreflang="ka"
                    href="https://ka.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/the-substitution-method" />
        
        <xhtml:link rel="alternate" hreflang="ko"
                    href="https://ko.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/the-substitution-method" />
        
        <xhtml:link rel="alternate" hreflang="pl"
                    href="https://pl.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/the-substitution-method" />
        
        <xhtml:link rel="alternate" hreflang="pt"
                    href="https://pt.khanacademy.org/math/pre-algebra/xb4832e56:systems-of-equations/xb4832e56:solving-systems-with-substitution/v/the-substitution-method" />
        
        <xhtml:link rel="alternate" hreflang="pt-pt"
                    href="https://pt-pt.khanacademy.org/math/pre-algebra/xb4832e56:systems-of-equations/xb4832e56:solving-systems-with-substitution/v/the-substitution-method" />
        
        <xhtml:link rel="alternate" hreflang="tr"
                    href="https://tr.khanacademy.org/math/pre-algebra/xb4832e56:systems-of-equations/xb4832e56:solving-systems-with-substitution/v/the-substitution-method" />
        
        <xhtml:link rel="alternate" hreflang="uk"
                    href="https://uk.khanacademy.org/math/pre-algebra/xb4832e56:systems-of-equations/xb4832e56:solving-systems-with-substitution/v/the-substitution-method" />
        
        <xhtml:link rel="alternate" hreflang="vi"
                    href="https://vi.khanacademy.org/math/toan-lop-9-viet-nam/xe71e73aeedaeaf4a:phuong-trinh-va-he-phuong-trinh-bac-nhat-toan-lop-9/xe71e73aeedaeaf4a:giai-he-phuong-trinh-bac-nhat-hai-an-bang-phuong-phap-the-toan-lop-9/v/the-substitution-method" />
        
        <xhtml:link rel="alternate" hreflang="zh-hans"
                    href="https://zh.khanacademy.org/math/pre-algebra/xb4832e56:systems-of-equations/xb4832e56:solving-systems-with-substitution/v/the-substitution-method" />
        
        <lastmod>2024-07-08T13:23:54.498043911Z</lastmod>
        
        <PageMap xmlns="http://www.google.com/schemas/sitemap-pagemap/1.0">
            <DataObject type="document" id="the-substitution-method">
            <Attribute name="title">Comment résoudre un système d&#39;équations linéaires par substitution - un exemple</Attribute>
            <Attribute name="description">On résout par substitution le système d&#39;équations linéaires : 2y = x + 7 et x = y - 4. On utilise l&#39;une des équations pour exprimer l&#39;une des inconnues en fonction de l&#39;autre. Ensuite, dans l&#39;autre équation on remplace cette inconnue par l&#39;expression trouvée. On obtient une équation à une inconnue que l&#39;on sait résoudre. On en déduit ensuite la valeur de la deuxième inconnue.</Attribute>
            <Attribute name="author">Sal Khan</Attribute>
            <Attribute name="type">video</Attribute>
            
            </DataObject>
        </PageMap>
        
        <video:video>
            <video:thumbnail_loc>https://cdn.kastatic.org/googleusercontent/baHMoKef-ogNFJ-sWgFBiJdyb_ouP6b8DA65uUie120OvuJlqupT7EgPmnlQfigT48uqx4Z5eGsuO6xZV3aG6fk</video:thumbnail_loc>
            <video:title>Comment résoudre un système d&#39;équations linéaires par substitution - un exemple</video:title>
            <video:description>On résout par substitution le système d&#39;équations linéaires : 2y = x + 7 et x = y - 4. On utilise l&#39;une des équations pour exprimer l&#39;une des inconnues en fonction de l&#39;autre. Ensuite, dans l&#39;autre équation on remplace cette inconnue par l&#39;expression trouvée. On obtient une équation à une inconnue que l&#39;on sait résoudre. On en déduit ensuite la valeur de la deuxième inconnue.</video:description>
            <video:player_loc>https://cdn.kastatic.org/ka-youtube-converted/_jtvmkFVhbc.mp4/_jtvmkFVhbc.mp4</video:player_loc>
            <video:duration>279</video:duration>
            <video:category>Résolution par substitution</video:category>
        </video:video>
        
    </url>
    
    <url>
        <loc>https://fr.khanacademy.org/math/3eme-annee-secondaire/xd903d14ae2b1276e:algebre-systemes-d-equations/xd903d14ae2b1276e:resolution-par-substitution/e/systems_of_equations_with_substitution</loc>
        
        <xhtml:link rel="alternate" hreflang="az"
                    href="https://az.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/e/systems_of_equations_with_substitution" />
        
        <xhtml:link rel="alternate" hreflang="bg"
                    href="https://bg.khanacademy.org/math/9-klas/xee41df55c1c831f0:sistemi-lineyni-uravneniya-s-dve-neizvestni/xee41df55c1c831f0:sistemi-lineini-uravneniya-s-dve-neizvestni-reshavane-chrez-zamestvane/e/systems_of_equations_with_substitution" />
        
        <xhtml:link rel="alternate" hreflang="bn"
                    href="https://bn.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/e/systems_of_equations_with_substitution" />
        
        <xhtml:link rel="alternate" hreflang="cs"
                    href="https://cs.khanacademy.org/math/9-trida/x4e76afc81ecf6617:soustavy-rovnic/x4e76afc81ecf6617:reseni-soustav-rovnic-dosazovaci-metodou/e/systems_of_equations_with_substitution" />
        
        <xhtml:link rel="alternate" hreflang="da"
                    href="https://da.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations/x2f8bb11595b61c86:solving-systems-of-equations-with-substitution/e/systems_of_equations_with_substitution" />
        
        <xhtml:link rel="alternate" hreflang="de"
                    href="https://de.khanacademy.org/math/algebra-home/alg-system-of-equations/alg-solving-systems-of-equations-with-substitution/e/systems_of_equations_with_substitution" />
        
        <xhtml:link rel="alternate" hreflang="el"
                    href="https://el.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations/x2f8bb11595b61c86:solving-systems-of-equations-with-substitution/e/systems_of_equations_with_substitution" />
        
        <xhtml:link rel="alternate" hreflang="en"
                    href="https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations/x2f8bb11595b61c86:solving-systems-of-equations-with-substitution/e/systems_of_equations_with_substitution" />
        
        <xhtml:link rel="alternate" hreflang="es"
                    href="https://es.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations/x2f8bb11595b61c86:solving-systems-of-equations-with-substitution/e/systems_of_equations_with_substitution" />
        
        <xhtml:link rel="alternate" hreflang="fr"
                    href="https://fr.khanacademy.org/math/3eme-annee-secondaire/xd903d14ae2b1276e:algebre-systemes-d-equations/xd903d14ae2b1276e:resolution-par-substitution/e/systems_of_equations_with_substitution" />
        
        <xhtml:link rel="alternate" hreflang="gu"
                    href="https://gu.khanacademy.org/math/pre-algebra/xb4832e56:systems-of-equations/xb4832e56:solving-systems-with-substitution/e/systems_of_equations_with_substitution" />
        
        <xhtml:link rel="alternate" hreflang="hi"
                    href="https://hi.khanacademy.org/math/in-in-grade-10-ncert/x573d8ce20721c073:pair-of-linear-equations-in-two-variables/x573d8ce20721c073:algebraic-methods/e/systems_of_equations_with_substitution" />
        
        <xhtml:link rel="alternate" hreflang="hu"
                    href="https://hu.khanacademy.org/math/az-algebra-alapjai/x17cf222d75f5bcf0:egyenletrendszerek/x17cf222d75f5bcf0:egyenletrendszerek-megoldasa-a-behelyettesito-modszerrel/e/systems_of_equations_with_substitution" />
        
        <xhtml:link rel="alternate" hreflang="hy"
                    href="https://hy.khanacademy.org/math/algebra/systems-of-linear-equations/solving-systems-of-equations-with-substitution/e/systems_of_equations_with_substitution" />
        
        <xhtml:link rel="alternate" hreflang="ja"
                    href="https://ja.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/e/systems_of_equations_with_substitution" />
        
        <xhtml:link rel="alternate" hreflang="ka"
                    href="https://ka.khanacademy.org/math/algebra/systems-of-linear-equations/solving-systems-of-equations-with-substitution/e/systems_of_equations_with_substitution" />
        
        <xhtml:link rel="alternate" hreflang="kk"
                    href="https://kk.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations/x2f8bb11595b61c86:solving-systems-of-equations-with-substitution/e/systems_of_equations_with_substitution" />
        
        <xhtml:link rel="alternate" hreflang="kn"
                    href="https://kn.khanacademy.org/math/ka-math-class-10/xcba1be8495b9410b:pair-of-linear-equations-in-two-variables-ncert-new/xcba1be8495b9410b:algebraic-methods-of-solving-a-pair-of-linear-equations/e/systems_of_equations_with_substitution" />
        
        <xhtml:link rel="alternate" hreflang="ko"
                    href="https://ko.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations/x2f8bb11595b61c86:solving-systems-of-equations-with-substitution/e/systems_of_equations_with_substitution" />
        
        <xhtml:link rel="alternate" hreflang="mr"
                    href="https://mr.khanacademy.org/math/revision-term-1-mh-math-class-10/x041ca11815640a3a:week-1/x041ca11815640a3a:linear-equations-in-two-variables/e/systems_of_equations_with_substitution" />
        
        <xhtml:link rel="alternate" hreflang="or"
                    href="https://or.khanacademy.org/math/revision-term-1-od-math-class-10/x03e14a980a7a91ad:week-1/x03e14a980a7a91ad:linear-simultaneous-equations/e/systems_of_equations_with_substitution" />
        
        <xhtml:link rel="alternate" hreflang="pa"
                    href="https://pa.khanacademy.org/math/in-in-grade-10-ncert/x573d8ce20721c073:pair-of-linear-equations-in-two-variables/x573d8ce20721c073:algebraic-methods/e/systems_of_equations_with_substitution" />
        
        <xhtml:link rel="alternate" hreflang="pl"
                    href="https://pl.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations/x2f8bb11595b61c86:solving-systems-of-equations-with-substitution/e/systems_of_equations_with_substitution" />
        
        <xhtml:link rel="alternate" hreflang="pt"
                    href="https://pt.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations/x2f8bb11595b61c86:solving-systems-of-equations-with-substitution/e/systems_of_equations_with_substitution" />
        
        <xhtml:link rel="alternate" hreflang="pt-pt"
                    href="https://pt-pt.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations/x2f8bb11595b61c86:solving-systems-of-equations-with-substitution/e/systems_of_equations_with_substitution" />
        
        <xhtml:link rel="alternate" hreflang="ro"
                    href="https://ro.khanacademy.org/math/algebra-basics/alg-basics-systems-of-equations/alg-basics-solving-systems-with-substitution/e/systems_of_equations_with_substitution" />
        
        <xhtml:link rel="alternate" hreflang="sgn-us"
                    href="https://sgn-us.khanacademy.org/math/algebra-basics/alg-basics-systems-of-equations/alg-basics-solving-systems-with-substitution/e/systems_of_equations_with_substitution" />
        
        <xhtml:link rel="alternate" hreflang="sv"
                    href="https://sv.khanacademy.org/math/algebra-basics/alg-basics-systems-of-equations/alg-basics-solving-systems-with-substitution/e/systems_of_equations_with_substitution" />
        
        <xhtml:link rel="alternate" hreflang="te"
                    href="https://te.khanacademy.org/math/class-10-tg/x6d741825a19c63c4:pair-of-linear-equations-in-two-variables/x6d741825a19c63c4:algebraic-methods-of-finding-the-solutions-for-a-pair-of-linear-equ/e/systems_of_equations_with_substitution" />
        
        <xhtml:link rel="alternate" hreflang="tr"
                    href="https://tr.khanacademy.org/math/11-sinif/xa522689791108f17:4-unite/xa522689791108f17:ikinci-dereceden-iki-bilinmeyenli-denklem-sistemleri/e/systems_of_equations_with_substitution" />
        
        <xhtml:link rel="alternate" hreflang="uk"
                    href="https://uk.khanacademy.org/math/7-klas/x035ef06b16a9ec90:sistemi-lninih-rvnyan/x035ef06b16a9ec90:rozvyazuvannya-sistem-lninih-rvnyan-metodom-pdstanovki/e/systems_of_equations_with_substitution" />
        
        <xhtml:link rel="alternate" hreflang="ur"
                    href="https://ur.khanacademy.org/math/grade-8-math-snc-aligned/x4383bdbca3d6abf7:linear-equations-and-inequalities/x4383bdbca3d6abf7:simultaneous-linear-equations-algebraic-solution/e/systems_of_equations_with_substitution" />
        
        <xhtml:link rel="alternate" hreflang="uz"
                    href="https://uz.khanacademy.org/math/algebra/systems-of-linear-equations/solving-systems-of-equations-with-substitution/e/systems_of_equations_with_substitution" />
        
        <xhtml:link rel="alternate" hreflang="vi"
                    href="https://vi.khanacademy.org/math/toan-lop-9-viet-nam/xe71e73aeedaeaf4a:phuong-trinh-va-he-phuong-trinh-bac-nhat-toan-lop-9/xe71e73aeedaeaf4a:giai-he-phuong-trinh-bac-nhat-hai-an-bang-phuong-phap-the-toan-lop-9/e/systems_of_equations_with_substitution" />
        
        <xhtml:link rel="alternate" hreflang="zh-hans"
                    href="https://zh.khanacademy.org/math/algebra/systems-of-linear-equations/solving-systems-of-equations-with-substitution/e/systems_of_equations_with_substitution" />
        
        <lastmod>2025-12-29T09:11:15.709226606Z</lastmod>
        
        <PageMap xmlns="http://www.google.com/schemas/sitemap-pagemap/1.0">
            <DataObject type="document" id="systems_of_equations_with_substitution">
            <Attribute name="title">La méthode par substitution</Attribute>
            <Attribute name="description">.</Attribute>
            <Attribute name="author">Tomer Gal</Attribute>
            <Attribute name="type">exercise</Attribute>
            
            </DataObject>
        </PageMap>
        
    </url>
    
    <url>
        <loc>https://fr.khanacademy.org/math/3eme-annee-secondaire/xd903d14ae2b1276e:algebre-systemes-d-equations/xd903d14ae2b1276e:resolution-par-substitution/v/solving-systems-by-substitution-1</loc>
        
        <xhtml:link rel="alternate" hreflang="az"
                    href="https://az.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/solving-systems-by-substitution-1" />
        
        <xhtml:link rel="alternate" hreflang="bg"
                    href="https://bg.khanacademy.org/math/9-klas/xee41df55c1c831f0:sistemi-lineyni-uravneniya-s-dve-neizvestni/xee41df55c1c831f0:sistemi-lineini-uravneniya-s-dve-neizvestni-reshavane-chrez-zamestvane/v/solving-systems-by-substitution-1" />
        
        <xhtml:link rel="alternate" hreflang="da"
                    href="https://da.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/solving-systems-by-substitution-1" />
        
        <xhtml:link rel="alternate" hreflang="de"
                    href="https://de.khanacademy.org/math/9te-10te-klasse-mathematik/xf1b287ae05c7bfd9:gleichungssysteme/xf1b287ae05c7bfd9:gleichungssysteme-losen-durch-substitution/v/solving-systems-by-substitution-1" />
        
        <xhtml:link rel="alternate" hreflang="el"
                    href="https://el.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/solving-systems-by-substitution-1" />
        
        <xhtml:link rel="alternate" hreflang="en"
                    href="https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/solving-systems-by-substitution-1" />
        
        <xhtml:link rel="alternate" hreflang="es"
                    href="https://es.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/solving-systems-by-substitution-1" />
        
        <xhtml:link rel="alternate" hreflang="fr"
                    href="https://fr.khanacademy.org/math/3eme-annee-secondaire/xd903d14ae2b1276e:algebre-systemes-d-equations/xd903d14ae2b1276e:resolution-par-substitution/v/solving-systems-by-substitution-1" />
        
        <xhtml:link rel="alternate" hreflang="hy"
                    href="https://hy.khanacademy.org/math/naxapatrastvir-10-rd-dasaranin/xb3fe689809091384:naxapatrastvir-havasarumneri-ev-anhavasarumneri-hamakarger-lucelun/xb3fe689809091384:gcayin-havasarumneri-hamakarger/v/solving-systems-by-substitution-1" />
        
        <xhtml:link rel="alternate" hreflang="ja"
                    href="https://ja.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/solving-systems-by-substitution-1" />
        
        <xhtml:link rel="alternate" hreflang="ka"
                    href="https://ka.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/solving-systems-by-substitution-1" />
        
        <xhtml:link rel="alternate" hreflang="ko"
                    href="https://ko.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/solving-systems-by-substitution-1" />
        
        <xhtml:link rel="alternate" hreflang="pl"
                    href="https://pl.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/solving-systems-by-substitution-1" />
        
        <xhtml:link rel="alternate" hreflang="pt"
                    href="https://pt.khanacademy.org/math/pre-algebra/xb4832e56:systems-of-equations/xb4832e56:solving-systems-with-substitution/v/solving-systems-by-substitution-1" />
        
        <xhtml:link rel="alternate" hreflang="pt-pt"
                    href="https://pt-pt.khanacademy.org/math/pre-algebra/xb4832e56:systems-of-equations/xb4832e56:solving-systems-with-substitution/v/solving-systems-by-substitution-1" />
        
        <xhtml:link rel="alternate" hreflang="tr"
                    href="https://tr.khanacademy.org/math/pre-algebra/xb4832e56:systems-of-equations/xb4832e56:solving-systems-with-substitution/v/solving-systems-by-substitution-1" />
        
        <xhtml:link rel="alternate" hreflang="uk"
                    href="https://uk.khanacademy.org/math/pre-algebra/xb4832e56:systems-of-equations/xb4832e56:solving-systems-with-substitution/v/solving-systems-by-substitution-1" />
        
        <xhtml:link rel="alternate" hreflang="vi"
                    href="https://vi.khanacademy.org/math/toan-lop-9-viet-nam/xe71e73aeedaeaf4a:phuong-trinh-va-he-phuong-trinh-bac-nhat-toan-lop-9/xe71e73aeedaeaf4a:giai-he-phuong-trinh-bac-nhat-hai-an-bang-phuong-phap-the-toan-lop-9/v/solving-systems-by-substitution-1" />
        
        <xhtml:link rel="alternate" hreflang="zh-hans"
                    href="https://zh.khanacademy.org/math/pre-algebra/xb4832e56:systems-of-equations/xb4832e56:solving-systems-with-substitution/v/solving-systems-by-substitution-1" />
        
        <lastmod>2024-07-08T13:23:54.498043911Z</lastmod>
        
        <PageMap xmlns="http://www.google.com/schemas/sitemap-pagemap/1.0">
            <DataObject type="document" id="solving-systems-by-substitution-1">
            <Attribute name="title">Résolution d&#39;un système par substitution : cas sans solution</Attribute>
            <Attribute name="description">On résout par substitution le système de 2 équations du premier degré à deux inconnues : y = -1/4x + 100 et y = -1/4x + 120. </Attribute>
            <Attribute name="author">Sal Khan</Attribute>
            <Attribute name="type">video</Attribute>
            
            </DataObject>
        </PageMap>
        
        <video:video>
            <video:thumbnail_loc>https://cdn.kastatic.org/googleusercontent/8-jmKFKC4W-USw99eCrcqS8GVQH0BYgXx7b3keFeuoabTCfTSXewomJGrXVQ2PdfCIPA7TaEcBxex1eHQuAxnNA7</video:thumbnail_loc>
            <video:title>Résolution d&#39;un système par substitution : cas sans solution</video:title>
            <video:description>On résout par substitution le système de 2 équations du premier degré à deux inconnues : y = -1/4x + 100 et y = -1/4x + 120. </video:description>
            <video:player_loc>https://cdn.kastatic.org/ka-youtube-converted/yyz62nWGbBA.mp4/yyz62nWGbBA.mp4</video:player_loc>
            <video:duration>224</video:duration>
            <video:category>Résolution par substitution</video:category>
        </video:video>
        
    </url>
    
    <url>
        <loc>https://fr.khanacademy.org/math/3eme-annee-secondaire/xd903d14ae2b1276e:algebre-systemes-d-equations/xd903d14ae2b1276e:resolution-par-substitution/v/substitution-method-2</loc>
        
        <xhtml:link rel="alternate" hreflang="az"
                    href="https://az.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/substitution-method-2" />
        
        <xhtml:link rel="alternate" hreflang="bg"
                    href="https://bg.khanacademy.org/math/9-klas/xee41df55c1c831f0:sistemi-lineyni-uravneniya-s-dve-neizvestni/xee41df55c1c831f0:sistemi-lineini-uravneniya-s-dve-neizvestni-reshavane-chrez-zamestvane/v/substitution-method-2" />
        
        <xhtml:link rel="alternate" hreflang="de"
                    href="https://de.khanacademy.org/math/9te-10te-klasse-mathematik/xf1b287ae05c7bfd9:gleichungssysteme/xf1b287ae05c7bfd9:gleichungssysteme-losen-durch-substitution/v/substitution-method-2" />
        
        <xhtml:link rel="alternate" hreflang="el"
                    href="https://el.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/substitution-method-2" />
        
        <xhtml:link rel="alternate" hreflang="en"
                    href="https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/substitution-method-2" />
        
        <xhtml:link rel="alternate" hreflang="es"
                    href="https://es.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/substitution-method-2" />
        
        <xhtml:link rel="alternate" hreflang="fr"
                    href="https://fr.khanacademy.org/math/3eme-annee-secondaire/xd903d14ae2b1276e:algebre-systemes-d-equations/xd903d14ae2b1276e:resolution-par-substitution/v/substitution-method-2" />
        
        <xhtml:link rel="alternate" hreflang="hy"
                    href="https://hy.khanacademy.org/math/naxapatrastvir-10-rd-dasaranin/xb3fe689809091384:naxapatrastvir-havasarumneri-ev-anhavasarumneri-hamakarger-lucelun/xb3fe689809091384:gcayin-havasarumneri-hamakarger/v/substitution-method-2" />
        
        <xhtml:link rel="alternate" hreflang="ja"
                    href="https://ja.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/substitution-method-2" />
        
        <xhtml:link rel="alternate" hreflang="ka"
                    href="https://ka.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/substitution-method-2" />
        
        <xhtml:link rel="alternate" hreflang="ko"
                    href="https://ko.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/substitution-method-2" />
        
        <xhtml:link rel="alternate" hreflang="pl"
                    href="https://pl.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/substitution-method-2" />
        
        <xhtml:link rel="alternate" hreflang="pt"
                    href="https://pt.khanacademy.org/math/pre-algebra/xb4832e56:systems-of-equations/xb4832e56:solving-systems-with-substitution/v/substitution-method-2" />
        
        <xhtml:link rel="alternate" hreflang="pt-pt"
                    href="https://pt-pt.khanacademy.org/math/pre-algebra/xb4832e56:systems-of-equations/xb4832e56:solving-systems-with-substitution/v/substitution-method-2" />
        
        <xhtml:link rel="alternate" hreflang="tr"
                    href="https://tr.khanacademy.org/math/pre-algebra/xb4832e56:systems-of-equations/xb4832e56:solving-systems-with-substitution/v/substitution-method-2" />
        
        <xhtml:link rel="alternate" hreflang="uk"
                    href="https://uk.khanacademy.org/math/pre-algebra/xb4832e56:systems-of-equations/xb4832e56:solving-systems-with-substitution/v/substitution-method-2" />
        
        <xhtml:link rel="alternate" hreflang="vi"
                    href="https://vi.khanacademy.org/math/toan-lop-9-viet-nam/xe71e73aeedaeaf4a:phuong-trinh-va-he-phuong-trinh-bac-nhat-toan-lop-9/xe71e73aeedaeaf4a:giai-he-phuong-trinh-bac-nhat-hai-an-bang-phuong-phap-the-toan-lop-9/v/substitution-method-2" />
        
        <xhtml:link rel="alternate" hreflang="zh-hans"
                    href="https://zh.khanacademy.org/math/pre-algebra/xb4832e56:systems-of-equations/xb4832e56:solving-systems-with-substitution/v/substitution-method-2" />
        
        <lastmod>2021-02-08T09:07:16Z</lastmod>
        
        <PageMap xmlns="http://www.google.com/schemas/sitemap-pagemap/1.0">
            <DataObject type="document" id="substitution-method-2">
            <Attribute name="title">Résoudre par substitution le système y=-5x+8 et 10x+2y=-2</Attribute>
            <Attribute name="description">On résout par substitution le système de 2 équations du 1er degré à deux inconnues :  y = -5x + 8 et 10x + 2y = -2</Attribute>
            <Attribute name="author">Sal Khan</Attribute>
            <Attribute name="type">video</Attribute>
            
            </DataObject>
        </PageMap>
        
        <video:video>
            <video:thumbnail_loc>https://cdn.kastatic.org/googleusercontent/LZKtq5MQExOWTJXDoMBcJn0mY03904EYUmFSWR4JYpFGDxtpRWCpmKu-W8-1AKi2OzWeS-kr7Nf9IJ-FB90tQLG3</video:thumbnail_loc>
            <video:title>Résoudre par substitution le système y=-5x+8 et 10x+2y=-2</video:title>
            <video:description>On résout par substitution le système de 2 équations du 1er degré à deux inconnues :  y = -5x + 8 et 10x + 2y = -2</video:description>
            <video:player_loc>https://cdn.kastatic.org/ka-youtube-converted/BhUCCnGM8bE.mp4/BhUCCnGM8bE.mp4</video:player_loc>
            <video:duration>224</video:duration>
            <video:category>Résolution par substitution</video:category>
        </video:video>
        
    </url>
    
    <url>
        <loc>https://fr.khanacademy.org/math/3eme-annee-secondaire/xd903d14ae2b1276e:algebre-systemes-d-equations/xd903d14ae2b1276e:resolution-par-substitution/a/substitution-method-review-systems-of-equations</loc>
        
        <xhtml:link rel="alternate" hreflang="az"
                    href="https://az.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/a/substitution-method-review-systems-of-equations" />
        
        <xhtml:link rel="alternate" hreflang="bg"
                    href="https://bg.khanacademy.org/math/9-klas/xee41df55c1c831f0:sistemi-lineyni-uravneniya-s-dve-neizvestni/xee41df55c1c831f0:sistemi-lineini-uravneniya-s-dve-neizvestni-reshavane-chrez-zamestvane/a/substitution-method-review-systems-of-equations" />
        
        <xhtml:link rel="alternate" hreflang="bn"
                    href="https://bn.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/a/substitution-method-review-systems-of-equations" />
        
        <xhtml:link rel="alternate" hreflang="cs"
                    href="https://cs.khanacademy.org/math/9-trida/x4e76afc81ecf6617:soustavy-rovnic/x4e76afc81ecf6617:reseni-soustav-rovnic-dosazovaci-metodou/a/substitution-method-review-systems-of-equations" />
        
        <xhtml:link rel="alternate" hreflang="da"
                    href="https://da.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations/x2f8bb11595b61c86:solving-systems-of-equations-with-substitution/a/substitution-method-review-systems-of-equations" />
        
        <xhtml:link rel="alternate" hreflang="de"
                    href="https://de.khanacademy.org/math/algebra-home/alg-system-of-equations/alg-solving-systems-of-equations-with-substitution/a/substitution-method-review-systems-of-equations" />
        
        <xhtml:link rel="alternate" hreflang="el"
                    href="https://el.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations/x2f8bb11595b61c86:solving-systems-of-equations-with-substitution/a/substitution-method-review-systems-of-equations" />
        
        <xhtml:link rel="alternate" hreflang="en"
                    href="https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations/x2f8bb11595b61c86:solving-systems-of-equations-with-substitution/a/substitution-method-review-systems-of-equations" />
        
        <xhtml:link rel="alternate" hreflang="es"
                    href="https://es.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations/x2f8bb11595b61c86:solving-systems-of-equations-with-substitution/a/substitution-method-review-systems-of-equations" />
        
        <xhtml:link rel="alternate" hreflang="fr"
                    href="https://fr.khanacademy.org/math/3eme-annee-secondaire/xd903d14ae2b1276e:algebre-systemes-d-equations/xd903d14ae2b1276e:resolution-par-substitution/a/substitution-method-review-systems-of-equations" />
        
        <xhtml:link rel="alternate" hreflang="gu"
                    href="https://gu.khanacademy.org/math/pre-algebra/xb4832e56:systems-of-equations/xb4832e56:solving-systems-with-substitution/a/substitution-method-review-systems-of-equations" />
        
        <xhtml:link rel="alternate" hreflang="hu"
                    href="https://hu.khanacademy.org/math/az-algebra-alapjai/x17cf222d75f5bcf0:egyenletrendszerek/x17cf222d75f5bcf0:egyenletrendszerek-megoldasa-a-behelyettesito-modszerrel/a/substitution-method-review-systems-of-equations" />
        
        <xhtml:link rel="alternate" hreflang="hy"
                    href="https://hy.khanacademy.org/math/algebra/systems-of-linear-equations/solving-systems-of-equations-with-substitution/a/substitution-method-review-systems-of-equations" />
        
        <xhtml:link rel="alternate" hreflang="ja"
                    href="https://ja.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/a/substitution-method-review-systems-of-equations" />
        
        <xhtml:link rel="alternate" hreflang="ka"
                    href="https://ka.khanacademy.org/math/algebra/systems-of-linear-equations/solving-systems-of-equations-with-substitution/a/substitution-method-review-systems-of-equations" />
        
        <xhtml:link rel="alternate" hreflang="kk"
                    href="https://kk.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations/x2f8bb11595b61c86:solving-systems-of-equations-with-substitution/a/substitution-method-review-systems-of-equations" />
        
        <xhtml:link rel="alternate" hreflang="ko"
                    href="https://ko.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations/x2f8bb11595b61c86:solving-systems-of-equations-with-substitution/a/substitution-method-review-systems-of-equations" />
        
        <xhtml:link rel="alternate" hreflang="pl"
                    href="https://pl.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations/x2f8bb11595b61c86:solving-systems-of-equations-with-substitution/a/substitution-method-review-systems-of-equations" />
        
        <xhtml:link rel="alternate" hreflang="pt"
                    href="https://pt.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations/x2f8bb11595b61c86:solving-systems-of-equations-with-substitution/a/substitution-method-review-systems-of-equations" />
        
        <xhtml:link rel="alternate" hreflang="pt-pt"
                    href="https://pt-pt.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations/x2f8bb11595b61c86:solving-systems-of-equations-with-substitution/a/substitution-method-review-systems-of-equations" />
        
        <xhtml:link rel="alternate" hreflang="ro"
                    href="https://ro.khanacademy.org/math/algebra-basics/alg-basics-systems-of-equations/alg-basics-solving-systems-with-substitution/a/substitution-method-review-systems-of-equations" />
        
        <xhtml:link rel="alternate" hreflang="sgn-us"
                    href="https://sgn-us.khanacademy.org/math/algebra-basics/alg-basics-systems-of-equations/alg-basics-solving-systems-with-substitution/a/substitution-method-review-systems-of-equations" />
        
        <xhtml:link rel="alternate" hreflang="sv"
                    href="https://sv.khanacademy.org/math/algebra-basics/alg-basics-systems-of-equations/alg-basics-solving-systems-with-substitution/a/substitution-method-review-systems-of-equations" />
        
        <xhtml:link rel="alternate" hreflang="tr"
                    href="https://tr.khanacademy.org/math/algebra/systems-of-linear-equations/solving-systems-of-equations-with-substitution/a/substitution-method-review-systems-of-equations" />
        
        <xhtml:link rel="alternate" hreflang="uk"
                    href="https://uk.khanacademy.org/math/7-klas/x035ef06b16a9ec90:sistemi-lninih-rvnyan/x035ef06b16a9ec90:rozvyazuvannya-sistem-lninih-rvnyan-metodom-pdstanovki/a/substitution-method-review-systems-of-equations" />
        
        <xhtml:link rel="alternate" hreflang="uz"
                    href="https://uz.khanacademy.org/math/algebra/systems-of-linear-equations/solving-systems-of-equations-with-substitution/a/substitution-method-review-systems-of-equations" />
        
        <xhtml:link rel="alternate" hreflang="vi"
                    href="https://vi.khanacademy.org/math/toan-lop-9-viet-nam/xe71e73aeedaeaf4a:phuong-trinh-va-he-phuong-trinh-bac-nhat-toan-lop-9/xe71e73aeedaeaf4a:giai-he-phuong-trinh-bac-nhat-hai-an-bang-phuong-phap-the-toan-lop-9/a/substitution-method-review-systems-of-equations" />
        
        <xhtml:link rel="alternate" hreflang="zh-hans"
                    href="https://zh.khanacademy.org/math/algebra/systems-of-linear-equations/solving-systems-of-equations-with-substitution/a/substitution-method-review-systems-of-equations" />
        
        <lastmod>2021-06-01T16:04:21Z</lastmod>
        
        <PageMap xmlns="http://www.google.com/schemas/sitemap-pagemap/1.0">
            <DataObject type="document" id="substitution-method-review-systems-of-equations">
            <Attribute name="title">Résoudre un  système d&#39;équations par substitution</Attribute>
            <Attribute name="description">Pour vérifier si vous avez bien compris et mémorisé.</Attribute>
            
            <Attribute name="type">article</Attribute>
            
            </DataObject>
        </PageMap>
        
    </url>
    
    <url>
        <loc>https://fr.khanacademy.org/math/3eme-annee-secondaire/xd903d14ae2b1276e:algebre-systemes-d-equations/xd903d14ae2b1276e:resolution-par-substitution/v/solving-systems-by-substitution-2</loc>
        
        <xhtml:link rel="alternate" hreflang="az"
                    href="https://az.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/solving-systems-by-substitution-2" />
        
        <xhtml:link rel="alternate" hreflang="bg"
                    href="https://bg.khanacademy.org/math/9-klas/xee41df55c1c831f0:sistemi-lineyni-uravneniya-s-dve-neizvestni/xee41df55c1c831f0:sistemi-lineini-uravneniya-s-dve-neizvestni-reshavane-chrez-zamestvane/v/solving-systems-by-substitution-2" />
        
        <xhtml:link rel="alternate" hreflang="da"
                    href="https://da.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/solving-systems-by-substitution-2" />
        
        <xhtml:link rel="alternate" hreflang="de"
                    href="https://de.khanacademy.org/math/9te-10te-klasse-mathematik/xf1b287ae05c7bfd9:gleichungssysteme/xf1b287ae05c7bfd9:gleichungssysteme-losen-durch-substitution/v/solving-systems-by-substitution-2" />
        
        <xhtml:link rel="alternate" hreflang="el"
                    href="https://el.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/solving-systems-by-substitution-2" />
        
        <xhtml:link rel="alternate" hreflang="en"
                    href="https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/solving-systems-by-substitution-2" />
        
        <xhtml:link rel="alternate" hreflang="es"
                    href="https://es.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/solving-systems-by-substitution-2" />
        
        <xhtml:link rel="alternate" hreflang="fr"
                    href="https://fr.khanacademy.org/math/3eme-annee-secondaire/xd903d14ae2b1276e:algebre-systemes-d-equations/xd903d14ae2b1276e:resolution-par-substitution/v/solving-systems-by-substitution-2" />
        
        <xhtml:link rel="alternate" hreflang="hy"
                    href="https://hy.khanacademy.org/math/naxapatrastvir-10-rd-dasaranin/xb3fe689809091384:naxapatrastvir-havasarumneri-ev-anhavasarumneri-hamakarger-lucelun/xb3fe689809091384:gcayin-havasarumneri-hamakarger/v/solving-systems-by-substitution-2" />
        
        <xhtml:link rel="alternate" hreflang="ja"
                    href="https://ja.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/solving-systems-by-substitution-2" />
        
        <xhtml:link rel="alternate" hreflang="ka"
                    href="https://ka.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/solving-systems-by-substitution-2" />
        
        <xhtml:link rel="alternate" hreflang="ko"
                    href="https://ko.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/solving-systems-by-substitution-2" />
        
        <xhtml:link rel="alternate" hreflang="pl"
                    href="https://pl.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/solving-systems-by-substitution-2" />
        
        <xhtml:link rel="alternate" hreflang="pt"
                    href="https://pt.khanacademy.org/math/pre-algebra/xb4832e56:systems-of-equations/xb4832e56:solving-systems-with-substitution/v/solving-systems-by-substitution-2" />
        
        <xhtml:link rel="alternate" hreflang="pt-pt"
                    href="https://pt-pt.khanacademy.org/math/pre-algebra/xb4832e56:systems-of-equations/xb4832e56:solving-systems-with-substitution/v/solving-systems-by-substitution-2" />
        
        <xhtml:link rel="alternate" hreflang="tr"
                    href="https://tr.khanacademy.org/math/pre-algebra/xb4832e56:systems-of-equations/xb4832e56:solving-systems-with-substitution/v/solving-systems-by-substitution-2" />
        
        <xhtml:link rel="alternate" hreflang="uk"
                    href="https://uk.khanacademy.org/math/pre-algebra/xb4832e56:systems-of-equations/xb4832e56:solving-systems-with-substitution/v/solving-systems-by-substitution-2" />
        
        <xhtml:link rel="alternate" hreflang="vi"
                    href="https://vi.khanacademy.org/math/toan-lop-9-viet-nam/xe71e73aeedaeaf4a:phuong-trinh-va-he-phuong-trinh-bac-nhat-toan-lop-9/xe71e73aeedaeaf4a:giai-he-phuong-trinh-bac-nhat-hai-an-bang-phuong-phap-the-toan-lop-9/v/solving-systems-by-substitution-2" />
        
        <xhtml:link rel="alternate" hreflang="zh-hans"
                    href="https://zh.khanacademy.org/math/pre-algebra/xb4832e56:systems-of-equations/xb4832e56:solving-systems-with-substitution/v/solving-systems-by-substitution-2" />
        
        <lastmod>2021-02-08T09:07:16Z</lastmod>
        
        <PageMap xmlns="http://www.google.com/schemas/sitemap-pagemap/1.0">
            <DataObject type="document" id="solving-systems-by-substitution-2">
            <Attribute name="title">Résoudre par substitution le système y=4x-17.5 et y+2x=6.5</Attribute>
            <Attribute name="description">On résout par substitution le système de 2 équations du 1er degré à deux inconnues :  y = 4x - 17.5 et y + 2x = 6.5</Attribute>
            <Attribute name="author">Sal Khan</Attribute>
            <Attribute name="type">video</Attribute>
            
            </DataObject>
        </PageMap>
        
        <video:video>
            <video:thumbnail_loc>https://cdn.kastatic.org/googleusercontent/B1x30i63cqzh1YieGKTgDfbpeHUKvhPmIfsmbgCZstjQs_KG5Kn-nuBpy6oCsQ3k7DvJ4Arrjap-jX5D2_ZAeYuJ</video:thumbnail_loc>
            <video:title>Résoudre par substitution le système y=4x-17.5 et y+2x=6.5</video:title>
            <video:description>On résout par substitution le système de 2 équations du 1er degré à deux inconnues :  y = 4x - 17.5 et y + 2x = 6.5</video:description>
            <video:player_loc>https://cdn.kastatic.org/ka-youtube-converted/w64GJzSk_jY.mp4/w64GJzSk_jY.mp4</video:player_loc>
            <video:duration>246</video:duration>
            <video:category>Résolution par substitution</video:category>
        </video:video>
        
    </url>
    
    <url>
        <loc>https://fr.khanacademy.org/math/3eme-annee-secondaire/xd903d14ae2b1276e:algebre-systemes-d-equations/xd903d14ae2b1276e:resolution-par-substitution/v/practice-using-substitution-for-systems</loc>
        
        <xhtml:link rel="alternate" hreflang="az"
                    href="https://az.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/practice-using-substitution-for-systems" />
        
        <xhtml:link rel="alternate" hreflang="bg"
                    href="https://bg.khanacademy.org/math/9-klas/xee41df55c1c831f0:sistemi-lineyni-uravneniya-s-dve-neizvestni/xee41df55c1c831f0:sistemi-lineini-uravneniya-s-dve-neizvestni-reshavane-chrez-zamestvane/v/practice-using-substitution-for-systems" />
        
        <xhtml:link rel="alternate" hreflang="bn"
                    href="https://bn.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/practice-using-substitution-for-systems" />
        
        <xhtml:link rel="alternate" hreflang="cs"
                    href="https://cs.khanacademy.org/math/9-trida/x4e76afc81ecf6617:soustavy-rovnic/x4e76afc81ecf6617:reseni-soustav-rovnic-dosazovaci-metodou/v/practice-using-substitution-for-systems" />
        
        <xhtml:link rel="alternate" hreflang="da"
                    href="https://da.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations/x2f8bb11595b61c86:solving-systems-of-equations-with-substitution/v/practice-using-substitution-for-systems" />
        
        <xhtml:link rel="alternate" hreflang="de"
                    href="https://de.khanacademy.org/math/algebra-home/alg-system-of-equations/alg-solving-systems-of-equations-with-substitution/v/practice-using-substitution-for-systems" />
        
        <xhtml:link rel="alternate" hreflang="el"
                    href="https://el.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations/x2f8bb11595b61c86:solving-systems-of-equations-with-substitution/v/practice-using-substitution-for-systems" />
        
        <xhtml:link rel="alternate" hreflang="en"
                    href="https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations/x2f8bb11595b61c86:solving-systems-of-equations-with-substitution/v/practice-using-substitution-for-systems" />
        
        <xhtml:link rel="alternate" hreflang="es"
                    href="https://es.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations/x2f8bb11595b61c86:solving-systems-of-equations-with-substitution/v/practice-using-substitution-for-systems" />
        
        <xhtml:link rel="alternate" hreflang="fr"
                    href="https://fr.khanacademy.org/math/3eme-annee-secondaire/xd903d14ae2b1276e:algebre-systemes-d-equations/xd903d14ae2b1276e:resolution-par-substitution/v/practice-using-substitution-for-systems" />
        
        <xhtml:link rel="alternate" hreflang="gu"
                    href="https://gu.khanacademy.org/math/pre-algebra/xb4832e56:systems-of-equations/xb4832e56:solving-systems-with-substitution/v/practice-using-substitution-for-systems" />
        
        <xhtml:link rel="alternate" hreflang="hu"
                    href="https://hu.khanacademy.org/math/az-algebra-alapjai/x17cf222d75f5bcf0:egyenletrendszerek/x17cf222d75f5bcf0:egyenletrendszerek-megoldasa-a-behelyettesito-modszerrel/v/practice-using-substitution-for-systems" />
        
        <xhtml:link rel="alternate" hreflang="hy"
                    href="https://hy.khanacademy.org/math/algebra/systems-of-linear-equations/solving-systems-of-equations-with-substitution/v/practice-using-substitution-for-systems" />
        
        <xhtml:link rel="alternate" hreflang="ja"
                    href="https://ja.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/practice-using-substitution-for-systems" />
        
        <xhtml:link rel="alternate" hreflang="ka"
                    href="https://ka.khanacademy.org/math/algebra/systems-of-linear-equations/solving-systems-of-equations-with-substitution/v/practice-using-substitution-for-systems" />
        
        <xhtml:link rel="alternate" hreflang="kk"
                    href="https://kk.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations/x2f8bb11595b61c86:solving-systems-of-equations-with-substitution/v/practice-using-substitution-for-systems" />
        
        <xhtml:link rel="alternate" hreflang="ko"
                    href="https://ko.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations/x2f8bb11595b61c86:solving-systems-of-equations-with-substitution/v/practice-using-substitution-for-systems" />
        
        <xhtml:link rel="alternate" hreflang="pa"
                    href="https://pa.khanacademy.org/math/in-in-grade-10-ncert/x573d8ce20721c073:pair-of-linear-equations-in-two-variables/x573d8ce20721c073:algebraic-methods/v/practice-using-substitution-for-systems" />
        
        <xhtml:link rel="alternate" hreflang="pl"
                    href="https://pl.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations/x2f8bb11595b61c86:solving-systems-of-equations-with-substitution/v/practice-using-substitution-for-systems" />
        
        <xhtml:link rel="alternate" hreflang="pt"
                    href="https://pt.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations/x2f8bb11595b61c86:solving-systems-of-equations-with-substitution/v/practice-using-substitution-for-systems" />
        
        <xhtml:link rel="alternate" hreflang="pt-pt"
                    href="https://pt-pt.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations/x2f8bb11595b61c86:solving-systems-of-equations-with-substitution/v/practice-using-substitution-for-systems" />
        
        <xhtml:link rel="alternate" hreflang="sgn-us"
                    href="https://sgn-us.khanacademy.org/math/algebra-basics/alg-basics-systems-of-equations/alg-basics-solving-systems-with-substitution/v/practice-using-substitution-for-systems" />
        
        <xhtml:link rel="alternate" hreflang="sr"
                    href="https://sr.khanacademy.org/math/algebra/systems-of-linear-equations/solving-systems-of-equations-with-substitution/v/practice-using-substitution-for-systems" />
        
        <xhtml:link rel="alternate" hreflang="tr"
                    href="https://tr.khanacademy.org/math/9-sinif/xb0a54780f151bbed:3-unite-denklem-ve-esitsizlikler/xb0a54780f151bbed:denklem-sistemleri/v/practice-using-substitution-for-systems" />
        
        <xhtml:link rel="alternate" hreflang="uk"
                    href="https://uk.khanacademy.org/math/7-klas/x035ef06b16a9ec90:sistemi-lninih-rvnyan/x035ef06b16a9ec90:rozvyazuvannya-sistem-lninih-rvnyan-metodom-pdstanovki/v/practice-using-substitution-for-systems" />
        
        <xhtml:link rel="alternate" hreflang="ur"
                    href="https://ur.khanacademy.org/math/grade-8-math-snc-aligned/x4383bdbca3d6abf7:linear-equations-and-inequalities/x4383bdbca3d6abf7:simultaneous-linear-equations-algebraic-solution/v/practice-using-substitution-for-systems" />
        
        <xhtml:link rel="alternate" hreflang="uz"
                    href="https://uz.khanacademy.org/math/algebra/systems-of-linear-equations/solving-systems-of-equations-with-substitution/v/practice-using-substitution-for-systems" />
        
        <xhtml:link rel="alternate" hreflang="vi"
                    href="https://vi.khanacademy.org/math/toan-lop-9-viet-nam/xe71e73aeedaeaf4a:phuong-trinh-va-he-phuong-trinh-bac-nhat-toan-lop-9/xe71e73aeedaeaf4a:giai-he-phuong-trinh-bac-nhat-hai-an-bang-phuong-phap-the-toan-lop-9/v/practice-using-substitution-for-systems" />
        
        <xhtml:link rel="alternate" hreflang="zh-hans"
                    href="https://zh.khanacademy.org/math/algebra/systems-of-linear-equations/solving-systems-of-equations-with-substitution/v/practice-using-substitution-for-systems" />
        
        <lastmod>2021-04-18T09:25:44Z</lastmod>
        
        <PageMap xmlns="http://www.google.com/schemas/sitemap-pagemap/1.0">
            <DataObject type="document" id="practice-using-substitution-for-systems">
            <Attribute name="title">Comment résoudre un système linéaire par substitution - un exemple</Attribute>
            <Attribute name="description">La résolution du système :  -3x - 4y = -2 et y = 2x - 5 par substitution</Attribute>
            <Attribute name="author">Sal Khan</Attribute>
            <Attribute name="type">video</Attribute>
            
            </DataObject>
        </PageMap>
        
        <video:video>
            <video:thumbnail_loc>https://cdn.kastatic.org/googleusercontent/628RjCJ_CsSqK0HqbIq8aNzgQ257wowuvmMVKKnUJmO9mpgtI2jeA2M8Zz15za_g4gB2lK1zv-A2gIIc8JNmvrKv</video:thumbnail_loc>
            <video:title>Comment résoudre un système linéaire par substitution - un exemple</video:title>
            <video:description>La résolution du système :  -3x - 4y = -2 et y = 2x - 5 par substitution</video:description>
            <video:player_loc>https://cdn.kastatic.org/ka-youtube-converted/mFkKmDuouOM.mp4/mFkKmDuouOM.mp4</video:player_loc>
            <video:duration>261</video:duration>
            <video:category>Résolution par substitution</video:category>
        </video:video>
        
    </url>
    
    <url>
        <loc>https://fr.khanacademy.org/math/3eme-annee-secondaire/xd903d14ae2b1276e:algebre-systemes-d-equations/xd903d14ae2b1276e:resolution-par-substitution/v/algebraic-word-problem</loc>
        
        <xhtml:link rel="alternate" hreflang="en"
                    href="https://www.khanacademy.org/math/8th-engage-ny/engage-8th-module-4/8th-module-4-topic-d/v/algebraic-word-problem" />
        
        <xhtml:link rel="alternate" hreflang="es"
                    href="https://es.khanacademy.org/math/8th-engage-ny/engage-8th-module-4/8th-module-4-topic-d/v/algebraic-word-problem" />
        
        <xhtml:link rel="alternate" hreflang="fr"
                    href="https://fr.khanacademy.org/math/3eme-annee-secondaire/xd903d14ae2b1276e:algebre-systemes-d-equations/xd903d14ae2b1276e:resolution-par-substitution/v/algebraic-word-problem" />
        
        <xhtml:link rel="alternate" hreflang="pl"
                    href="https://pl.khanacademy.org/math/8th-engage-ny/engage-8th-module-4/8th-module-4-topic-d/v/algebraic-word-problem" />
        
        <xhtml:link rel="alternate" hreflang="ur"
                    href="https://ur.khanacademy.org/math/grade-7-math-snc-aligned/xf9992e17a4bae62e:equations-and-inequalities/xf9992e17a4bae62e:solving-simultanous-linear-equations-using-substitution-and-elimination/v/algebraic-word-problem" />
        
        <xhtml:link rel="alternate" hreflang="vi"
                    href="https://vi.khanacademy.org/math/toan-lop-9-viet-nam/xe71e73aeedaeaf4a:phuong-trinh-va-he-phuong-trinh-bac-nhat-toan-lop-9/xe71e73aeedaeaf4a:giai-bai-toan-bang-cach-lap-he-phuong-trinh-bac-nhat-hai-an-toan-lop-9/v/algebraic-word-problem" />
        
        <lastmod>2022-10-11T13:15:03.880452631Z</lastmod>
        
        <PageMap xmlns="http://www.google.com/schemas/sitemap-pagemap/1.0">
            <DataObject type="document" id="algebraic-word-problem">
            <Attribute name="title">La méthode de substitution</Attribute>
            <Attribute name="description">Apprendre à résoudre un système d&#39;équations.</Attribute>
            <Attribute name="author">Sal Khan</Attribute>
            <Attribute name="type">video</Attribute>
            
            </DataObject>
        </PageMap>
        
        <video:video>
            <video:thumbnail_loc>https://cdn.kastatic.org/googleusercontent/DS7hFPlNv8UVEWWiPErUW-V17sA-yxuWpoMh7XqGKNd6hGbTMo6lxfdgCkoS1GFeQ9ZGhQGbUHaWIQPVCJkofv3E</video:thumbnail_loc>
            <video:title>La méthode de substitution</video:title>
            <video:description>Apprendre à résoudre un système d&#39;équations.</video:description>
            <video:player_loc>https://cdn.kastatic.org/ka-youtube-converted/rOBD69Pc7n8.mp4/rOBD69Pc7n8.mp4</video:player_loc>
            <video:duration>482</video:duration>
            <video:category>Résolution par substitution</video:category>
        </video:video>
        
    </url>
    
</urlset>
