Réponses

2014-09-06T11:30:02+02:00
4x-1=0 
4x-1 = 0
4x-1+1 = 0+1
4x = 1
x = 1/4

5x+2 = 0
5x+2-2 = 0-2
5x = -2 
x = -2/5

3x+5 = 0
3x+5-5 = 0-5
3x = -5
x = -5/3

2x-3 = 0
2x-3+3 = 0+3
2x = 3
x = 3/2

7x+1 = 0
7x+1-1 = 0-1
7x = -1
x = -1/7

5x-6 = 0
5x-6+6 = 0+6
5x = 6
x = 6/5