(4 1/8 *1 5/11- 2 2/9:1 2/3)х = 1
(33/8 *16/11 -20/9: 5/3)х =1
(6-20/9* 5/3)х =1
(6-4/3) х = 1
5 1/3 х = 1
6/3 х =1
х =1:6/3
х= 1*3/6
х=3/6
(5 4/7 :13/28 +3 2/6 * 1 5/19) х = 1
(39/7 : 13/28 + 20/6 * 24/19)х =1
(39/7 * 28/13 + 20/6 * 24/19)х =1
(12+80/19_)х=1
(12+ 4 4/19)х = 1
(16 4/19)х=1
308/19 х = 1
х = 1 : 308/19
х = 1*19/308
х = 19/308