Answer
$ \frac{12-2x}{3x}$
Work Step by Step
Given : $\frac{4}{x} - \frac{2}{3}$
This becomes : $\frac{4\times3}{x\times3} - \frac{2\times x}{3\times x}$
(Finding the least common denominator)
$= \frac{12}{3x} - \frac{2x}{3x}$
$= \frac{12-2x}{3x}$