Réponses

2014-03-11T21:24:41+01:00
Bonsoir

E= 2(x +9) + 4x = 2x +18 +4x = 6x +18

F= 6(x + 2) + 4 (2x - 10) = 6x +12 +8x -40 = 14x - 28

G= - 3(x + 4) - (6x - 10) = -3x -12 -6x +10 = -9x -2

H= 3(4 - 5x) + 2 (1 + x) + 3 (x + 9) = 12 - 15x +2 +2x +3x +27 = -10x +41