Julie a cinq ans de plus que moi et Marc a le double de mon âge. A nous trois, nous avons 77ans. Quel est mon âge ?Mettre ce problème en équation et le résoudre.

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Réponses

Meilleure réponse !
2014-03-30T17:57:09+02:00
Bonjour

pas d'énervement, il suffit de raisonner

moi = x
julie = x +5
marc = 2x

x + x +5 + 2x = 77
4x = 77 - 5
4x = 72
x = 18
tu as 18 ans, julie 23 et marc 36
ESt jai un autre devoir sil te plait je te le donne en prive