### Home > AC > Chapter 12 > Lesson 12.1.2 > Problem 12-16

12-16.

Because the denominators are the same, you can add the numerators together.

Factor 9 out of the numerator and simplify the equation by looking for factors that make 1.

9

Subtract the numerators, then try factoring.

Be sure to distribute the negative when performing the subtraction.

Look for factors that make 1.