equation math 3 eme pouvait vous maider pour cest equation: 2x + 9 = -7 5x -7= -8 10- 3x = 18 9x - 4 =5x -1 5x + 11 = 3+8x merci d avance ❤❤

bonsoir

2 x + 9 = - 7
2 x = - 7 - 9
2 x = - 16
x = - 8

5 x - 7 = - 8
5 x = - 8 + 7
5 x = - 1
x = - 1/5

10 - 3 x = 18
- 3 x = 18 - 10
- 3 x = 8
x = - 8/3

9 x - 4 = 5 x - 1
9 x - 5 x = - 1 + 4
4 x = 3
x = 3/4

5 x + 11= 3 + 8 x
5 x - 8 x = 3 - 11
- 3 x = - 8
x = 8/3

2x = -7-9
2x = -16
x = -8

5x = -8+7
5x = -1
x = -1/5

-3x = 18-10
-3x = 8
x = 8/-3

9x -5x = 4-1
4x = 3
x = 3/4

5x- 8 x = -11+3
-3x = - 8
 x = -8/-3
x = 8/3