((25/90 - 24/90) : 1/6 + 3 14/15) : 0,8 Х
--------------------------------------------------- = -----------------------------------------
76/25 * 5/12 - 2/3 11/8 : (4 15/48 - 3 8/48)
(1/90 : 1/6 + 3 14/15) : 0,8 Х
--------------------------------------- = ----------------------------------
19/5 * 1/3 - 2/3 11/8 : 1 7/48
(1/90 * 6/1 + 3 14/15) : 0,8 Х
---------------------------------------- = -----------------------------------------
19/15 - 2/3 11/8 : 55/48
(6/90 + 3 14/15) : 0,8 Х
-------------------------------- = -----------------------------
19/15 - 10/15 11/8 * 48/55
(2/30 + 59/15) : 0,8 Х
------------------------------- = -------------------------
9/15 1/1 * 6/5
(2/30 + 118/30) : 0,8 Х
----------------------------- = ----------------------------
9/15 6/5
120/30 : 0,8 Х
---------------- = ------------
9/15 6/5
98/30 : 8/10 Х
------------------- = --------------
9/15 6/5
120/30 * 10/8 Х
----------------- = --------------
9/15 6/5
15/3 * 1/1 Х
--------------- = ------------
9/15 6/5
5 : 9/15 = х : 6/5
9/15Х = 5 * 6/5
9/15х = 6
х = 6 : 9/15
х = 6 * 15/9
х = 2 * 15/3
х = 30/3
х = 10