|3x-1|-x=2

* Hướng dẫn giải

$\begin{array}{l}\left|3x-1\right|-x=2\left(2\right)\\ -)x\ge \frac{1}{3}\Rightarrow \left(2\right)\iff 3x-1-x=2\iff x=\frac{3}{2}(tm)\\ -)x<\frac{1}{3}\Rightarrow \left(2\right)\iff 1-3x-x=2\iff x=-\frac{1}{4}(tm)\end{array}$