Réponses

2014-04-27T10:41:40+02:00
2014-04-27T10:47:26+02:00
Salut :)

a) 2(x + 3) = 3(x + 2)
2x + 6 = 3x + 6
6 = x + 6
x = 6 - 6
x = 0

b) 3 + 2(x - 1) = 3x + 6
3 + 2x - 2 = 3x + 6
2x + 1 = 3x + 6
1 = x + 6
x = - 5

c) 5x - 2(3x + 1) = 3(x - 7)
5x - 6x - 2 = 3x - 21
-x - 2 = 3x - 21
-2 = 4x - 21
19 = 4x
x = 19/4

J'espère t'avoir aidé(e) ! :)