Réponse :
(a) - x - 8/7 = - 1/4) x - 1/7 ⇔ - x + (1/4) x = - 1/7 + 8/7 ⇔ - 3/4) x = 1
⇔ x = - 4/3
(b) 1/2) t - 1 = 1/3) t - 2 ⇔ 1/2) t - (1/3) t = - 2 + 1 ⇔ 1/6) t = - 1 ⇔ t = - 6
(c) a + 1 = - 7/4) a - 1/3 ⇔ a + (7/4) a = - 1/3 - 1 ⇔ 11/4) a = - 4/3
⇔ a = - 16/33
(d) 1/2) x + 1/6 = 1/4) x + 1/3 ⇔ 1/2) x - 1/4) x = 1/3 - 1/6 ⇔ 1/4) x = 1/6
⇔ x = 4/6 = 2/3
Explications étape par étape
