Réponses

2014-02-23T20:49:33+01:00
Bonsoir

a)-3(3x+1)-(2+x)=0
-9x -3 -2 +x = 0
-8x = 2 +3
-8x = 5
x = -5/8

b)4(x-5)+7(3-2x)=-5(3x+1)

4x -20 + 21 - 14x = -15x -5
4x -14x +15x = -5 +20 -21
5x = -6
x = -6/5