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suzannecornou
@suzannecornou
February 2023
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bonjour
il y a trois ans j'avais la moitie de l'age de mon frere , et aujourd'hui j'ai 9 ans de moins que lui ; quel age a t il ?
repondre en equation
merci
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kixii
x = âge de mon frère
y = mon âge
x - 3 = âge de mon frère il y a 3 ans
(x-3) / 2 = mon âge il y a 3 ans = y-3
x-9 = y
(x-3)/2 = x-9-3
x-3 = 2(x-12)
x-3 = 2x -24
x = 21
Mon frère a 21 ans
Et j’ai 12 ans
2 votes
Thanks 2
suzannecornou
merci beaucoup
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y = mon âge
x - 3 = âge de mon frère il y a 3 ans
(x-3) / 2 = mon âge il y a 3 ans = y-3
x-9 = y
(x-3)/2 = x-9-3
x-3 = 2(x-12)
x-3 = 2x -24
x = 21
Mon frère a 21 ans
Et j’ai 12 ans