#### Answer

$\frac{3}{n}$

#### Work Step by Step

By inspection, we see that there is a common denominator of 3n. Therefore, we obtain:
$\frac{5}{3n}+\frac{4}{3n}$
$=\frac{5+4}{3n}$
$=\frac{9}{3n}$
$=\frac{3}{n}$

Published by
Cengage Learning

ISBN 10:
1285194055

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

$\frac{3}{n}$

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