Answer: x = 3
Explanation:
We will create an equation based on the given information and the given function.
Equation given that f(x) = 2x + 9 and f(x) = 15.
15 = 2x + 9
Subtract 9 from both sides of the equation.
6 = 2x
Divide both sides of the equation by 2.
3 = x