Question

the sum of two rational number is-18/ 21 .lf one rational number is- 3/7 find the other.​

Answer 1

Let the other number be x

According to the question

x + (-3/7) = - 18/21

x= 3/7 - 18/21

Taking LCM

x = (9-18)/21

x = - 9/21

The required number is - 9/21

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Answer 2

Step-by-step explanation:

here is your answer mate