Réponses

2014-02-26T12:42:55+01:00
A) 4x + 2 = 3x + 5
a) 4x - 3x + 2 = 5
a) x = 5 + 2
a) x = 7

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

c) Je ne sais pas, désolée :/