Question

What rational number should be subtracted from the sum of 3/14and -4/7to get 13/21​

Answer 1

Sum of 3/14 and -4/7 is:

→ 3/14+(-4/7)

→ 3/14-4/7

→ 3/14-8/15/4

→ 3-8/14

→-5/14

Let the x should be subtracted from -5/14 to get 13/21

So,

-5/14-x=13/21

→-x=13/21-5/14

→ -x= 13×14-5×21/21×14

→ -x= 182-105/294

→ -x= 77/294

→ -x= 11/42

→ x= -11/42