Résoudre les équations : 5x+9-3x=2x-1+x 2(1-3x)+9-3x=2x-3(2+x) 3x+1/2=5/2x-3

bonjour

5 x + 9 - 3 x = 2 x - 1 + x
5 x - 3 x - 2 x - x = - 1 - 9
- x - - 10
x = 10

2 ( 1 - 3 x) + 9 - 3 x = 2 x - 3 ( 2 + x)
2 - 6 x + 9 - 3 x = 3 x - 6 - 3 x
- 6 x - 3 x - 3 x + 3 x = - 6 - 9 - 2
- 9 x = - 17
x = 17/9

3 x + 1/2 = 5 x /2 - 3
6 x + 1 = 5 x - 6
6 x - 5 x = - 6 - 1
x = - 7