Question

The sum of two rational numbers is −15 . If one of them is 6 , find the other.

Answer 1

Answer:

Let, the second number be = x

First number = 6

Sum of these two numbers = -15

So,

x + 6 = -15

=> x = -15 - 6

=> x = - 21

Second number is = -21

Ans. -21

Verifying :

x + 6 = -15

=> -21 + 6 = -15

=> -15 = -15

Verified

Hope it helps.

Answer 2

Answer:

The sum of two rational numbers is −15 . If one of them is 6, So another number must be -21.

Step-by-step explanation:

Let unknown number is x, So given is

$x + 6 = -15$

So from basic math, we know that for equation solution Left hand side = Right hand side.

$x + 6 = -15\\x = -15-6\\x = -21$

For Left hand side = Right hand side, x must be -21.