Bonjour j'ai besoin d'aide svp : a) 5x -4 = 3x + 2 b) 7x +3 = 3x - 2 c) -4= 6 + 5x d) x=4x - 6

5x -4 = 3x +2
5x -3x = +4 +2
2x = 6
x = 6/2 = 3

7x +3 = 3x -2
7x -3x = -3 -2
4x = -5
x = -5/4

-4 = 6 +5x
-5x = +4 +6
-5x = 10
x = 10/5 = 2

x = 4x -6
x -4x = -6
-3x = -6 
x = +6/3 = 2