1) 4 6/13 + 1 7/13 = 5 13/13 = 6
12-7/22=11 22/22 - 7/22 = 11 15/22
15 - 2 2/3 = 14 3/3 - 2 2/3 = 12 1/3
10 9/13 - 5 11/13 = 9 22/13 - 5 11/13 = 4 11/13
2) 5 2/13 - х = 3 4/13
х= 5 2/13 - 3 4/13
х= 4 15/13 - 3 4/13
х= 1 9/13
х- 5 6/7 = 2 3/7
х= 5 6/7 + 2 3/7
х= 6 9/7
х= 7 2/7
(х+ 3 11/13) - 5 12/13 = 2 5/13
х+ 3 11/13 = 5 12/13 + 2 5/13
х+ 3 11/13 = 7 17/13
х+ 3 11/13 = 8 3/13
х= 8 3/13 - 3 11/13
х= 7 16/13 - 3 11/13
х= 4 5/13