### Home > AC > Chapter 5 > Lesson 5.1.4 > Problem 5-40

5-40.

Rena says that if *x* = −5, the equation below is true. Her friend, Dean, says the answer is *x* = 3. Who is correct? **Justify** your conclusion. Homework Help ✎

9(*x* + 4) = 1 + 2*x*

Substitute both numbers in for *x* and see which one makes the statement true.

If Joe said *x* = 2

9((2) + 4) = 1 + 2(2)

9(6) = 4

54 = 4

This statement is not true.

Now you try with the numbers given in the problem.