Réponses

2014-05-11T13:45:00+02:00
-3(3x+1)-(2+x)=0
-9x - 3 - 2 - x =0
-10x - 5 = 0
-10x = 5
x = 5/-10
x = -1/2

4(x-5)+7(3-2x)=-5(3x+1)
4x - 20 + 21 - 14x = - 15x - 5
4x -14x + 15x = - 5 - 21 + 20
5x = -6
x = -6/5