#### Answer

$\frac {20}{x}$

#### Work Step by Step

To add fractions with common denominators, you add the numerators and place it over the common denominator.
$\frac {11}{x}$+$\frac {9}{x}$=$\frac {11+9}{x}$=$\frac {20}{x}$

Published by
Pearson

ISBN 10:
0-13417-805-X

ISBN 13:
978-0-13417-805-9

$\frac {20}{x}$

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