Question

3целых 1/12:х=5целых 4/7:18/37

Answer 1

3 1/2 : х = 5 4/7 : 18/37
3 1/2 : х = 34/7 * 37/18 = 17/7 * 37/9 = 629/63
х = 3 1/2 : 629/63 = 7/2 * 629/63 = 629/126 = 4 125/126

Answer 2

откуда 347 там наверно 397