3/10 = 0,3 1/4 = 0,25 10 3/10 - 2х = 8 1/4
------------------------------------- 2х = 10 3/10 - 8 1/4
10 3/10 - 2х = 8 1/4 2х = 10 6/20 - 8 5/20
10,3 - 2х = 8,25 2х = 2 1/20
2х = 10,3 - 8,25 х = 41/20 : 2
2х = 2,05 х = 41/20 * 1/2
х = 2,05 : 2 х = 41/40
х = 1,025 х = 1 целая 1/40