bonsoir
4 x - 12 = 0
4 x = 12
x = 3
4 x + 1 = 0
4 x = - 1
x = - 1/4
2 x - 3 = 0
2 x = 3
x = 3/ 2
2 - 3 x = 0
- 3 x = - 2
x = 2/3
ax + b = 0
ax = - b
2 x + 8 = 0
2 x = - 8
x = - 4
2 - 7 x = 0
- 7 x = - 2
x = 2/7
3 x - 1 = 0
3 x = 1
x = 1/3
7 x + 8 = 0
7 x = - 8
x = - 8/ 7
allez termine