### Home > A2C > Chapter 7 > Lesson 7.3.5 > Problem 7-225

7-225.

Add or subtract and simplify each of the following expressions. **Justify** that each step of your process makes sense.

Because the denominators are the same, simply add the numerators.

To get a common denominator:

When subtracting, distribute the negative to all terms in the numerator of the second fraction.