3/4 - х - 1/12 = 1/5

2/3 -х = 1/5

2/3 - 1/5 = х

х = 7/15

б

16/3 х - 1 = 10/9

16/3 х = 10/9 + 1

16/3 х = 19/9

х = 19/9 / 16/3

х = 19/48