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            <Attribute name="author">Ben</Attribute>
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            <Attribute name="description">Les données concernent l&#39;âge d&#39;une personne ou les âges de deux personnes. Dans certains exercices, on demande, par exemple, dans combien d&#39;années l&#39;âge de l&#39;un sera le quadruple de l&#39;âge de l&#39;autre. Dans d&#39;autres exercices on demande l&#39;âge de la personne en jeu ou de l&#39;une des personnes en jeu. Dans tous les cas Il faut mettre le problème en équation.</Attribute>
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