## Algebra: A Combined Approach (4th Edition)

Published by Pearson

# Chapter 7 - Section 7.3 - Adding and Subtracting Rational Expressions with the Same Denominator and Least Common Denominator - Practice: 4

#### Answer

a)LCD=45 b)LCD=3x-7

#### Work Step by Step

a) $\frac{2}{9}$, $\frac{7}{15}$ 9=3*3 15=3*5 LCD=3*3*5=45 b) $\frac{3x}{3x-7}$, $\frac{7}{3x-7}$, LCD=3x-7

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