Answer
$\frac{2}{3x}$
Work Step by Step
$\frac{2}{9x}$ +$\frac{4}{9x}$ Add the numerator, Keep the common denominator.
=$\frac{2+4}{9x}$ =$\frac{6}{9x}$ =$\frac{2\times3}{3\times3x}$
=$\frac{2}{3x}$
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