Réponses

  • Utilisateur Brainly
2014-06-02T17:45:12+02:00
-3(a-4) =5(a+3)
-3a+ 12 = 5a+15
-3a-5a = -12+15
-8a = +3
a = -3/8

2014-06-02T17:46:26+02:00
Résoudre algébriquement :

-3(a - 4) = 5(a + 3)
- 3a + 12 = 5a + 15
- 3a - 5a = 15 - 12
- 8a = 3
a = - 3/8