Réponses

2014-04-09T21:47:57+02:00
A) 2x-4=4x+6
 3x-4-4x-6 =0
-x -10 = 0
-x =10
x = -10

b) -2(x+2)=6
-2x -4 = 6
-2x =6+4
-2x =10
x =10/2
x =5