Réponses

2014-10-08T14:47:55+02:00
3x- 5 = 2 (1 - x)
3x - 5 = 2 - 2x
3x + 2x = 2 + 5
5x = 7
x = 5/7
2014-10-08T14:50:02+02:00
-15=2x1+2 fois x
-15=2+2x
-15-2x=2+2x
-15=2