Question

what rational number should be subtracted fr
om the sum of 3/14 and -4/7 to get 13/21?

Answer 1

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

= 3/14+(-4/7)

= 3/14 - 4/7

= 3/14 - 4/7×2/2

= 3/14-8/14

= (3-8)/14

= -5/14

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

Let the number be 'x'

-5/14 - x = 13/21

x = -5/14-13/21

x = -5/14×3/3 - 13/21×2/2

x = -15/42-26/42

x = (-15-26)/42

x = -41/42

Therefore, -41/42 should be subtracted from the sum of 3/14 and -4/7 to get 13/21.

Hope it helps