The sum of a number and 9 is multiplied by -2 and the answer is -8. Find the number.

Question

The sum of a number and 9 is multiplied by -2 and the answer is -8. Find the number.

Answer 1

Let the number be  a

( a+9)* (-2) = -8

a+9 = 4

a= 4-9 = -5

Answer 2

-2(n+9)=-8

-2n-18=-8

-2n=18-8

-2n=10

n=10/(-2)

n=-5