√ (10 / 4х-58) = 1/7,
(√ (10 / 4х-58) )² = (1/7)²,
10 / (4х-58) = 1/49,
4х-58 = 49*10,
4х-58 = 490,
4х = 490+58,
4х = 548,
х = 548 : 4,
х = 137,
проверка:
√ (10 / 4*137 - 58) = 1/7,
√ (10 / 490) = 1/7,
√ (1/49) = 1/7,
1/7 = 1/7
Надо сделать неправильную дробь 4×21+84=168. 168/84=2
40/8 + 95=100
(3+5)8=64
(7*5)-5=35-5=30
(46-16)/6=30/6=5