Réponse :
Bonjour
Explications étape par étape :
x + 7 = 5
x = -7 + 5 = -2
x - 8 = -6
x = +8 -6 = +2
4x = -12
x = -12/4 = -3
x + 6 = 7
x = -6 + 7 = 1
x/3 = -1
x = -3
-2x - 4 = 0
-2x = 4
x = 4/-2
x = -2
