Réponses

2012-12-26T17:26:07+01:00

Bonsoir

1)

-4x+8 = 5x-10

8+10 = 5x+4x

9x =18

x = 18/9 = 2

2)

3(2x-1)-3(x+2) = 0

3 [ ( 2x-1) -(x+2)] =0

3( x-3) =0  alors

x-3 = 0 

x = 3

3)

-2(3x+1) =-x-3 

-6x - 2 +x +3 = 0

-5x = -1

 x =1/5