Question

The sum of two rational number is -5/7 . If one of the number is -11/21 , find the number

Answer 1

1st number= -11/27
let 2nd number be= x

ATQ
-11/27+x=-5/7
-11+27x/27=-5/7
-11+27x=27*(-5)/7
-11+27x=-135/7
27x=135/7+-11
27x=135-77/7
27x=58/7
x=58/7*27
x=58/189

2nd number= 58/189