Réponse :
11 + 2(x - 6) + 4(-3x - 6)
= 13(x - 6) + 4(-3x - 6)
= 13 * x - 13 * 6 + 4 * (-3)x - 4 * 6
= 13x - 78 + (-12)x - 24
= 13x + (-12)x - 78 - 24
= 1x - 54
Bon courage ^-^