Réponse :
b) - 13/6) + x = - 3 ⇔ x = - 3 + (13/6) ⇔ x = - 18/6) + 13/6 = - 5/6
2/3) + x = - 13/6 ⇔ x = - 13/6) - 2/3 ⇔ x = -13/6) - 4/6 = - 17/6
- 17/6) + x = - 5/6 ⇔ x = - 5/6 + 17/6 = 12/6 = 2
- 3
-13/6 - 5/6
2/3 -17/6 2
Explications étape par étape