a) (23/32 + х) - 13/32 = 27/32
23/32 + х = 27/32 + 13/32
23/32 + х = 40/32
х = 40/32 - 23/32
х = 17/32
Ответ: 17/32
б) 39/48 - (41/48 - х) = 5/48
41/48 - х = 39/48 - 5/48
41/48 - х = 34/48
х = 41/48 - 34/48
х = 7/48
Ответ: 7/48