Bonjour !
a. AB = AM + MB = x + 6
b. AB = AC - BC = 8 - x
c. AB = AC + CD + DE + EF + FB = x + x + x + x + x = 5x
d. AB = AG + GH + HB = x + x + 5 = 2x + 5
e. AB = MN / 5 = x/5
f. AB = AC + CM + MN + NB = x + 2 + 2 + 2 = x + 6
J'espère t'avoir aidé. Bon courage !
