1) 2 - 3(2х + 2) = 5 - 4х
2 - 6х - 6 = 5 - 4х
6х - 4х = 2 + 5 - 6
2х = 1
х = 1/2
2) 1 - 2(5 - 2х) = - х - 3
1 - 10 + 4х = - х - 3
4х + х = 10 - 3 - 1
5х = 6
х = 6 : 5
х = 1,2
3) - 4 + х/5 = (х + 4)/2
- 4 * 5 * 2 + 2х = 5(х + 4)
- 40 + 2х = 5х + 20
5х - 2х = - 40 - 20
3х = = - 60
х = - 60 : 3
х = - 20
4) х/4 + х = 4
х + 4х = 4 * 4
5х = 16
х = 16 : 5
х = 3,2