Réponse :
C = 5 + 3(2x + 2) = 6 - 4(x + 1)
5 + 6x + 6 = 6 − 4x − 4
6x + 11 = − 4x + 2
6x + 11 + 4x = 2
10x + 11 = 2
10x = 2 − 11
10x = − 9
x = -9 / 10
:))
