The sum of a number, ,w and 9 is multiplied by -3 , and the result is -15 . What is the number?

Answer 1

Let's set up the equation to solve for the number:

(-3)(x + w + 9) = -15

Distribute the -3 on the left side:

-3x - 3w - 27 = -15

Add 27 to both sides to isolate the x variable:

-3x - 3w = 12

Divide all terms by -3 to solve for x:

x + w = -4

Therefore, the number is -4.