bonjour
2 ( x + 1 ) + 3 ( x - 1 ) = 0
2 x + 2 + 3 x - 3 = 0
5 x = 3 - 2
5 x = 1
x = 1/5
2 x + 1 - ( 4 - x ) = 5 x - 2
2 x + 1 - 4 + x = 5 x - 2
2 x + x - 5 x = - 2 - 1 + 4
- 2 x = 1
x = - 1 /2
3 ( x - 1 ) - 5 ( 2 - 3 x ) = 5
3 x - 3 - 10 + 15 x = 5
18 x = 5 + 3 + 10
18 x = 18
x = 1
