bonjour
4 ( 2 x - 1 ) = 7
8 x - 4 = 7
8 x = 7 + 4
8 x = 11
x = 11/8
- 2 x + 3 = - 2 ( x - 5 )
- 2 x + 3 = - 2 x + 10
- 2 x + 2 x = 10 - 3
0 x = 7
pas de solution
- 5 ( 4 + 3 x ) = 2 ( - x + 1 )
- 20 - 15 x = - 2 x + 2
- 15 x + 2 x = 2 + 20
- 13 x = 22
x = - 22/13
- 4 x - 10 = - 5 x - 1
- 4 x + 5 x = - 1 + 10
x = 9
3 x /10 + 1.4 = x + 2
3 x /10 + 14 /10 = 10 x /10 + 20/10
3 x - 10 x = 20 - 14
- 7 x = 6
x = - 6/7
6 - 3 x = 5 - x
- 3 x + x = 5 - 6
- 2 x = - 1
x = 1/2
