Réponse :
bonjour,
a. 13 + (x - 6) = 13 + x- 6
= x + 7
b. - 5 – (4 – 2x) = -5 - 4 + 2x
= 2x - 9
c. 10 - (x + 3) + (- 3x + 6) = 10 - x - 3-3x +6
= -4x + 13
d. (5 + 2x) – (-7 – 7x) = 5 + 2x + 7 + 7x
= 9x + 12
e. x – 8 – (2 + 4x — (9 – 5x)) = x - 8 - ( 2 + 4x - 9 + 5x ) = x - 8 - 2 - 4x + 9 - 5x
= -8x -1
voila:)
