Réponses

2014-05-19T17:53:06+02:00
Bonsoir

3x -4 = 8
3x = 8 +4
3x = 12
x = 4


-5x +7 = 6
-5x = 6 -7
-5x = -1
x = 1/5

x/4 - 2 = -7
x - 8 = - 28
x = -28 +8
x = -20