Answer
$\frac{11x}{18}$
Work Step by Step
$\frac{7x}{18}+\frac{2x}{9}=\frac{7x}{18}+\frac{2x\times2}{9\times2}=\frac{7x}{18}+\frac{4x}{18}=\frac{7x+4x}{18}=\frac{11x}{18}$
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