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Lune85
@Lune85
May 2019
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Bonjour à tous, SVP HELP ME PLEASE !!!
Félix et guillaume sont frère.
Si Félix donnait 3 ans de son âge à guillaume, ce dernier serait 2 fois plus vieux que lui. Et s'il lui en donnait 6, il serait 5 fois plus vieux.
Comment est ce possible te quel serait l'âge des deux frère.
Merci à vous !
Lune85
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Commentaires (8)
Bonsoir ,
y l'âge de F .
x l'âge de G .
{ x+3 = 2(y-3) ---------> x+3 = 2y-6 -----> x = 2y-9
{ x+6 = 5(y-6)
(2y-9) + 6 = 5y - 30
2y - 5y = -30+9-6
-3y = -27
y = -27/-3
y = 9 .
x = 9 .
2 votes
Thanks 2
Lune85
Oh merci c'est super !!!
Lune85
Je perlait à la meilleure réponse
Lune85
LOL
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y l'âge de F .
x l'âge de G .
{ x+3 = 2(y-3) ---------> x+3 = 2y-6 -----> x = 2y-9
{ x+6 = 5(y-6)
(2y-9) + 6 = 5y - 30
2y - 5y = -30+9-6
-3y = -27
y = -27/-3
y = 9 .
x = 9 .