bonjour
x + 5 = 12
x = 12 - 5
x = 7
3 x = 15
x = 15/3 = 5
6 x + 2 = 2 x + 22
6 x - 2 x = 22 - 2
4 x = 20
x = 5
8 x - 3 = - 2 x + 27
8 x + 2 x = 27 + 3
10 x = 30
x = 3
4 x + 7 = 6 x - 1
4 x - 6 x = - 1 - 7
- 2 x = - 8
x = - 8 /- 2 = 4
5 x - 10 = 5 x + 3
5 x - 5 x = 3 + 10
0 x = 13
pas de solution
bonne journée
