X - 5/8 = 1/8
x= 1/8 + 5/8 = 6/8
x= 3/4
x - 6/21 = 1/3
x= 1/3 + 6/21 = 7/21 + 6/21
x= 13/21
x * 13/27 = 7/27
x= 7/27 : 13/27 = 7/27 * 27/13 = 7/13
х = 7/13
х * 15/29 = 12/29
х = 12/29 : 15/29 = 12/29 * 29/15 = 12/15
х = 4/5
х: 4/9 = 1/9
х = 1/9 * 4/9
х = 4/81
х: 7/9 = 2/9
х = 2/9 * 7/9
х = 14/81
х - 2/3 = 1/3
х = 1/3 +2/3 = 3/3
х=1
х * 5/19 = 4/19
х = 4/19 : 5/19 = 4/19 * 19/5
х = 4/5
2х + 3/4 = 7/8
2х = 7/8 - 3/4
2х = 7/8 - 6/8
2х = 1/8
х = 1/8 : 2 = 1/8 * 1/2
х = 1/16
2х -3/4 = 7/8
2х = 7/8 +3/4
2х= 7/8 + 6/8
х= 13/8 : 2 = 13/8 * 1/2
х= 13/16
4х * 2/9 = 7/18
4х= 7/18 : 2/9
4х = 7/18 * 9/2
4х = 7/4
х = 7/4 : 4 = 7/4 * 1/4
х =7/16