Answer
$\frac{9x}{20}$
Work Step by Step
$\frac{x}{4}$ +$\frac{x}{5}$
= $\frac{x}{4}$$\times$$\frac{5}{5}$ + $\frac{x}{5}$$\times$$\frac{4}{4}$
=$\frac{5x}{20}$ + $\frac{4x}{20}$
=$\frac{5x+4x}{20}$
=$\frac{9x}{20}$
Prealgebra (7th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321955048
ISBN 13:
978-0-32195-504-3
Chapter 7 - Section 7.6 - Percent and Problem Solving: Interest - Exercise Set - Page 519: 33
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