Réponses

2013-10-19T12:51:34+02:00
Bonjour Romuald


x +2 = 4
x = 4 -2
x = 2

5(x -4 ) = 4(2x+1) -4
5x -20 = 8x +4 -4
5x -8x = 4 -4 +20
-3x = 20
x = -20/3

2(x+8) = 4 - (3x+8)
2x +16 = 4 - 3x -8
2x +3x = 4 -8 -16
5x = -20
x = -20/5 = -4