а)
133:(38х--95)=7,
38х-95 = 133 : 7,
38х-95 = 19,
38х = 19+95,
38х = 114,
х = 114:38,
х = 3,
б)
15×(53--8х)=75,
53-8х = 75: 15,
53-8х = 5,
8х = 53-5,
8х = 48,
х = 48:8,
х = 6,
в)
(6х--29)×8=104,
6х-29 = 104:8,
6х-29 = 13,
6х = 13+29,
6х = 42,
х = 42:6,
х = 7