Bonsoir,
1) 5x + 6 = x + 30
5x - x = 30 - 6
4x = 24
x = 24/4
x = 6
2) 3x - 4 - x = x + 2 - 4x
2x - 4 = 2 - 3x
2x + 3x = 2 + 4
5x = 6
x = 6/5
x = 1,2
3) 5x - 2 = 4x + 3
5x - 4x = 3 + 2
x = 5
4) -2x + 7 = 11
-2x = 11 - 7
-2x = 4
x = 4/-2
x = -2
5) 3x + 6 = x + 2
3x - x = 2 - 6
2x = -4
x = -4/2
x = -2
