Réponses

2013-04-07T14:18:38+02:00
3-(4x-7)=(2x+3)-(6x-6)
-4x+10=-4x+9
-4x+10-10=4x+9-10
-4x=4x-1
-4x-4x=4x-1-4x
-8x=-1
-8x:-8=-1:-8=0,125