Réponses

Meilleure réponse !
2014-05-21T19:41:49+02:00
2(3x + 4) - 5 ( 1 - 2x ) = 7 ( 2x - 3 ) + 12
6x+8-5+10x = 14x-21+12
16x +3 = 14x -9
16x -14x = -9-3
2x = -12
x =-12/2
x = -6