Bonjour,
1) 7x-1/3 - x-3/8= 2x - 10/6
7x - x - 2x = - 10/6 + 1/3 + 3/8
4x = - 40/24 + 8/24 + 9/24
4x = - 23/24
x = - 23/24 * 1/4
x = - 23/96
2) 3x-5/6 - -x+4/3 = 7x-4/2
3x - 5/6 + x + 4/3 = 7x - 4/2
3x + x - 7x = - 4/2 + 5/6 - 4/3
- 3x = - 12/6 + 5/6 - 8/6
- 3x = - 15/6
x = 15/6 * 1/3
x = 15/18
x = 5/6
3) -10x+1/8 - 9x+3/4 = 5x+5/6
- 10x - 9x - 5x = 5/6 - 1/8 - 3/4
- 24x = 20/24 - 3/24 - 18/24
- 24x = 0
x = 0