8 1/5 -х+7 1/4= - 1 4/5 +3х +2 1/2
8 4/20 - х+7 5/20= - 1 16/20 +3х +2 10/20
-х -3х= - 1 16/20 -8 4/20 - 7 5/20 +2 10/20
- 4х= - 14 15/20= - 14 3/4
4х=14 3/4
х=14 3/4 : 4
х=59/4 * 1/4
х=59/16=3 11/16
2х - 2 - 2/5 х=3/4 х - 1/2 - 2/5х
2х - 3/4х=2 -1/2
1 1/4 х=1 1/2
х=3/2 : 5/4
х=3/2 * 4/5
х=3/5