Réponse :
Bonjour
Explications étape par étape
A = 8- (6x+2)
A = 8 -6x -2
A = -6x +6
B = 7x +(-3x+9)
B = 7x -3x +9
B = 4x +9
C= 3x+ (6x+4)- (3-5x)
C = 3x +6x +4 -3 +5x
C = +14x +1
D = -3(6x-1)
D = -18x +3
E = -3(6x-1) +4(5x+7)
E = -18x +3 +20x +28
E = +2x +31
F= -4(8-5x) +7(-3+6x)
F = -32 +20x -21 +42x
F = +62x -53
