30-х=4 11/23
х=30-4 11/23
х=25 12/23
б)
(х-17/29)-11/29=2 9/29
х-17/29=2 9/29+11/29
х-17/29=3 1/29
х=3 1/29+17/29
х=3 18/29
в)
52-х=19 13/37
х=52-19 13/37
х=32 24/37
г)
(7 36/37-х)+6 8/37=9 1/37
7 36/37-х=9 1/37-6 8/37
7 36/37-х=2 30/37
х=7 36/37-2 30/37
х=5 6/37
