2/9х = 5/12
х = 5/12 : 2/9
х = 5/12 * 9/2
х = 5/4 * 3/2
х = 15/8 = 1 7/8
4/15у = 2/5
у = 2/5 : 4/15
у = 2/5 * 15/4
у = 1/1 * 3/2
у = 3/2 = 1 1/2 = 1,5
3/5х = 6
х = 6 : 3/5
х = 6/1 * 5/3
х = 2 * 5
х = 10
7/8у = 14
у = 14 : 7/8
у = 14/1 * 8/7
у = 2 * 8
у = 16
3/7х = 1 4/5
х = 1 4/5 : 3/7
х = 9/5 * 7/3
х = 3/5 * 7/1
х = 21/5 = 4 1/5 = 4,2
9/10у = 4 1/2
у = 4 1/2 : 9/10
у = 9/2 * 10/9
у = 1/1 * 5/1
у = 5