Question

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

Answer 1

hey dear

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here is your answer


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solution

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let the rational be x


3 / 14 - ( - 4/7) = 13 /21


3 /14 + 4 / 7 = 13 /21


Lcm of( 14 , 7 )I s 14


3 /14 + 4*2 / 7*2 = 13 /21



3 /14 + 8 / 14. = 13 /21


11 / 14. + x = 13 /21


x = 13 /21 - 11 /14


x = Lcm of (21 , 14 ) is 42


x = 13 *2 / 21 *2 - 11*3 / 14 *3


x = 26 / 42 - 33 / 42



x = -7 / 42


x = - 1 /6



hence your answer is - 1 / 6

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hope it helps


thank you