Question

Amy and Stephanie were playing a number game. Amy picked a number and told Stephanie that if she added 9 to the number and multiplied the sum by 3, it would equal 12. Which equation could Stephanie use to find the number, x?

Answer 1

Answer: 3(x+9) = 12

Explanation:

you can set up the equation as 3(x+9) = 12, since sum of x+9 multiply by 3 will equal 12, therefore you have that equation.

To solve for x:

3(x+9) = 12

x+9 = 4

x = -5