Réponse :
Ex 1:
A = -6 + x - 3 + 2x
A = 3x - 9
B = -2x - (x + 1)
B = -2x - x - 1
B = -3x - 1
C = 4x + (2x - 1) - (2x - 4)
C = 4x + 2x - 1 - (2x - 4)
C = 6x - 1 - 2x + 4
C = 4x + 3
Ex 2:
D = 3(2+4x)
D = 6 + 12x
E = 1 - 2(x+4)
E = 1 - 2x + 8
E = -2x + 9
F = 2(x - 1) + 3(2 - 2x)
F = 2x - 2 + 6 - 6x
F = -4x + 4
Ex 3 :
C = 4 * 1 + 3
C = 7
F = -4 * 1 + 4
F = 0
