Réponse :
A = 2(3x + 5) = 6x + 10
6x = -10
x = -10/6 = (-5*2)/(3*2) = -5/3
E = -5(2x + 2) = -10x - 10
-10x = 10
x = 10/-10 = -1
B = 3(7-4x) = 21 - 12x
12x = 21
x = 21/12 = (3*7)/(3*4) = 7/4
F = 7(-3x+5x) = -21x + 35x = 14x
Explications étape par étape
