Réponses

2012-11-09T17:43:51+01:00

2-(3-4x)=2(3-4x)

2-3+4x = 6 - 8x

4x + 8x = 6 + 1

12x = 7

x = 7/12

 

7(2x-5)-3x = 4 + (8x +1)

14x - 35 - 3x = 4 + 8x + 1

11x - 8x = 5 + 35

3x = 40

x = 40/3

 

4 - (3x -5) = -4(3x-2)

4-3x+5=-12x + 8

-3x + 12x = 8 - 4 - 5

9x = -1

x = -1/9