Réponses

  • Omnes
  • Modérateur confirmé
2014-03-07T20:17:51+01:00
Salut,

7-2(3b + 1) = - (4-4b)
7 - 6b -2 = -4 + 4b
-6b - 4b = -4 + 2 - 7
-10b = -9
b = -9/ -10 = 9/10
Bonne soirée !

2014-03-07T20:18:13+01:00
7-2(3b + 1) = -(4-4b)
7- 2*3b -2*1 = -4+4b
7 - 6b - 2 = -4+4b
-6b+5 = -4+4b
-6b-4b+5-5 = -4-5+4b-4b
-10b = -9
b = -9/(-10)
b = 9/10