Réponses

Meilleure réponse !
  • Utilisateur Brainly
2014-05-10T12:27:20+02:00
1)  
8 y - 3 = 5(2 y - 3) + 6
8y -3 = 10y-15 +6
8y -10y = 3 -15 +6
-2y = -6
y = 6/2 
y = 3

2)
3(2x - 4) = 9 - 3(x - 5)
6x-12 = 9 - 3x -15
6x +3x = 12 +9 +15
9x = 36
x = 36/9
x = 4