Svp j’ai besoin d’aide des équations en maths merci d’avance

5.
3x + 5 = 6x - 1
3x - 6x = -1 -5
-3x = -6
x = 2

6.
6x - 2 = 4 (x - 3)
6x - 2 = 4x - 12
6x - 4x = -12 + 2
2x = -10
x = -5

7.
-7x - 12 = -2 (-5 - 2x)
-7x - 12 = 10 + 4x
-7x - 4x = 10 + 12
-11x = 22
x = -2