1) 2х +17 = 22 + 3х
2х - 3х = 22 - 17
х = -5
2) 25 - 4х = 12 - 5х
-4х + 5х = 12 - 25
х = - 13
3)21х + 45 = 17 + 14х
21х - 14х = 17 - 45
7х = -28
х = -28 : 7 = - 4
4) 3,4х - 4 = 4,8 - х
3,4х - х = 4,8 + 4
2,4 х = 8,8
х = 8,8 : 2,4 = 88/10 : 24/10 = 88/10 * 10/24 = 22/6 = 3 4/6 = 3 2/3
5) 5 - 3х = 2х - 8
-3х - 2х = - 8 - 5
-5х = -13
х = 13 : 5 = 2 3/5
6) 1,5х + 8 = 3,1 + 16
1,5х = 3,1 + 16 - 8 = 19,1 - 8 = 11,1
х = 11,1 : 1,5 = 111/10 : 15/10 = 111/10 * 10/15 = 111/15 = 7 6/15 = 7 2/5