bonjour
x - 7 = 2
x = 2 + 7
x = 9
- 3 x = 4
x = - 4/3
7 x = 6
x = 6 /7
x / - 5 = 12
x = - 60
3 x - 7 = 12
3 x = 12 + 7
3 x = 19
x = 19/3
donc même solution que 3 x = 19
4 x + 13 = 8
4 x = 8 - 13
4 x = - 5
x = - 5/4 donc même solution que 4 x = - 5
4 x / 3 = 12
4 x = 36
x = 9 donc même solution que 4 x = 36
x + 11 = - 7
x = - 7 - 11
x = - 18
4 x = 9
x = 9/4
4 x /7 = 18
4 x = 126
x = 63/2
3 x /4 = 4 /2 difficile à lire
6 x = 16
x = 16/6 = 8/3
