Answer
$\dfrac{2}{3x}$
Work Step by Step
Given: $\dfrac{2}{9x}+\dfrac{4}{9x}$
Since,in the given rational expressions denominator are same, thus take it as common and add the rational terms simply.
Thus, $\dfrac{2}{9x}+\dfrac{4}{9x}=\dfrac{2+4}{9x}$
or, $=\dfrac{6}{9x}$
or, $=\dfrac{2}{3x}$
