Answer
$\frac{5\sqrt {5x}}{9}$
Work Step by Step
$\frac{\sqrt {20x}}{9}+\sqrt \frac{{5x}}{9}$
$\frac{2\sqrt {5x}}{9}+\frac{\sqrt {5x}}{3}$ The LCD is 9.
$\frac{2\sqrt {5x}}{9}+\frac{3\sqrt {5x}}{9}$
$\frac{5\sqrt {5x}}{9}$ Add.
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