The sum of two ratinal numbers is -8. If one of the numbers is , find the other

It is given that,

The sum of the two numbers = -8

One of the number =

Suppose the other number is x

Since, the sum is -8

Therefore,

x + = -8

= -8

7x - 15 = -56

7x = -56 + 15

7x = -41

x =