1.
x + 14/27 = 25/27
x= 25/27 - 14/27
x= 11/27

2.
32/35 - (x - 18/35) = 17/35
32/35 - x + 18/35 = 17/35
10/7 - x = 17/35
-x = 17/35 - 10/7
-x = - 33/35
x = 33/35