решите уравнение ( 5 7/9-x) 2 3/4=3 5/12

11/4 * 52/9 - 2 3/4 х = 3 5/12
11*52/4*9 - 2 3/4 х = 3 5/12
143/9 - 2 3/4 х = 3 5/12
15 8/9 - 2 3/4 х = 3 5/12
2 3/4 х = 15 8/9 - 3 5/12
2 3/4 х = 15 32/36 - 3 15/36
2 3/4х = 12 17/36
х = 12 17/36 : 2 3/4
х =  449 * 4/36 *11 
х = 449/ 9*11
х = 449/99
х = 4 53/99