Question

(314+521X):37=3 14

Answer 1

(3/14 + 5/21х) : 3/7 = 3 1/4
3/14 + 5/21х = 13/4 * 3/7
3/14 + 5/21х = 39/28 
5/21х = 39/28 - 6/28 = 33/28
х = 33/28 : 5/21
х = 33/28 * 21/5 = (33*3)/(4*5)
х = 99/20 
х = 4 целых 19/20