Réponses

2014-03-19T13:16:46+01:00
Bonjour

a) 3x + 4 = 0           
3x = -4
x = -4/3

b) 4 (x + 2) = x - 1

4x + 8 = x -1
4x -x = -1 -8
3x = -9
x = -3