Question

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

find the number.

Answer 1

The missing number is equal to -5.

-2(x + 9) = -8

Distributive property.

-2x - 18 = -8

Add 18 to both sides.

-2x = 10

Divide both sides by -2.

x = -5