Question

The sum of two rational number is -4 if one of them number is-3/5 find the other

Answer 1

Let unknown rational no. Be x
So,
x+(-3/5)=-4
x-3/5=-4
5x-3/5=-4
5x-3=-20
5x=-20+3
5x=-17
x=-17/5 ans.

Answer 2

we take the no to be x

x+-3/5=4

=>x = -4/1+3/5

=(-20+3)/5

=-17/5