Bonsoir,
Résoudre les équations suivantes :
3(x-1)+10=4x+7
3x - 3 + 10 = 4x + 7
3x - 4x = 7 + 3 - 10
- x = 10 - 10
x = 0
45x+21= - 45x+21
45x + 45x = 21 - 21
90x = 0
x = 0
5x+3(-x-3)=2
5x - 3x - 9 = 2
5x - 3x = 2 + 9
2x = 11
x = 11/2
x = 5, 5
2x+8=-13x-22
2x + 13x = - 22 - 8
15x = - 30
x = - 30/15
x = - 2.