Question

Решить:(1/2-1/7-1/4):(2 5/14-1 18/21-1/3)

Answer 1

   ...........................=3/7

1)   1/2 - 1/7 - 1/4=14/28 - 4/28 - 7/28=3/28
2)   2 5/14 - 1 18/21 - 1/3=2 15/42 - 1 36/42 - 14/42=7/42=1/6
3)   3/28 : 1/6=3/28 * 6=6/14=3/7