#### Answer

$\frac{13x}{8}$

#### Work Step by Step

By inspection, we see that the LCM is $8$. Therefore, we create a common denominator to obtain:
$\frac{3x}{8}+\frac{5x}{4}$
$=\frac{3x+2(5x)}{8}$
$=\frac{3x+10x}{8}$
$=\frac{13x}{8}$

Published by
Cengage Learning

ISBN 10:
1285194055

ISBN 13:
978-1-28519-405-9

$\frac{13x}{8}$

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