1. x = 12 \ 1\3 = 36
2. 6x = 10,2
x = 10,2\6 = 1,7
3. 5x - 3x = 7
2x = 7
x = 7/2 = 3,5
4. 6x - 3x = 3
3x = 3
x = 1
5. 2x - 6x + 5 = 45
4x = -40
x = -40\4
x = -10
6. x = 18 \ 1\6
x = 108
7. 7x = -11,9
x = -11,9\7
x = -1,7
8. 5x - 7x - 7 = 9
2x = -16
x = -8
10. 2x + 7 = 3x - 6x + 2
3x - 6x - 2x = 7 - 2
-5x = 5
x = -1
11. 4 - 2x - 6 = 4x - 20
6x = 18
x = 3
12. 3x = 2
x = 2/3
13. 2x - 16 - 5x - 30 = 2
-3x = 48
x = -16
14. 9 - 7x - 21 = 5 - 6x
x = -35