1. х= 29 7/8+ 51 5/12
х= 239/8 + 617/12
x= 717/24 + 1234/24
x= 1951/24
x= 81 7/24= 81 1/4
2. x= 60 3/14- 41 4/21
x= 843/14-865/21
x= 2529/42-1730/42
x= 799/42
x= 19 1/42
