Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 7 - Section 7.4 - Adding and Subtracting Rational Expressions with Different Denominators - Exercise Set: 28

Answer

3

Work Step by Step

$\frac{7x}{x-3}$-$\frac{4x+9}{x-3}$= $\frac{7x-(4x+9)}{x-3}$= $\frac{7x-4x-9}{x-3}$=$\frac{3x-9}{x-3}$=$\frac{3(x-3)}{x-3}$ = 3
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