Réponses

2014-10-26T17:21:08+01:00
Bonjour

4 x - 5 = 4 x - 7
4 x - 4 x = - 7 + 5
0 x = -2
x = 0

3 - x = 10 x -7
- x - 10 x = - 7 - 3
- 11 x = -10
x = 10/11

- 2 x≥ 24
x ≤ - 12