Réponses

2014-09-10T16:49:24+02:00
8(3x+7)=x+5(x-1)
24x + 56 = x + 5x - 5
24x - x - 5x = - 5 - 56
18x = - 61
x = 61/18

8x+1/2=4x+3
16x/2 + 1/2 = 8x/2 + 6/2
16x - 8x = 6 - 1
8x = 5
x = 5/8

-10x+6= - 4x+1
- 10x + 4x = 1 - 6
- 6x = - 5
x = 5/6

2(x+3)-2x=4x+3+(-1)
2x + 6 - 2x = 4x + 3 - 1
2x - 2x - 4x = + - 1 - 6
- 4x = - 7
x = 7/4

5x+(-9+5)=-(3x+1)+2

5x - 9 + 5 = 3x + 1 + 2
5x - 3x = 1 + 2 + 9 - 5
2x = 7
x = 7/2
x = 3,5