Réponse :
Explications étape par étape
5x - 2 = 7x + 14
5x = 7x + 14 + 2 = 7x +16
5x - 7x = 16
-2x = 16
x = 16/-2 = -8
x = -8
7x + 3 = -2x + 8
7x = -2x +8 -3 = -2x +5
7x + 2x = 5
9x = 5
x = 5/9
-4x + 5 = 3 - 2x
-4x = 3 - 2x - 5 = -2 - 2x
-4x + 2x = -2
-2x = -2
x = -2/-2 = 1
8x - 2 = 4x - 7
8x = 4x -7 +2 = 4x -5
8x - 4x = -5
4x = -5
x = -5/4
