Bonjour
Résoudre les équations suivantes :
1) 3x – 8 = 4
3x = 4 + 8
3x = 12
x = 12/3
x = 4
2) 5x - 3 = 3x + 7
5x - 3x = 7 + 3
2x = 10
x = 10/2
x = 5
3) - 4x + 9 = x - 2
- 4x - x = - 2 - 9
- 5x = - 11
x = 11/5
4) 2x + 11 = - 6x - 1
2x + 6x = - 1 - 11
8x = - 12
x = - 12/8
x = - 3/2
5) 7x – 15 = 4x + 5
7x - 4x = 5 + 15
3x = 20
x = 20/3.
