\(\Leftrightarrow\left|3x-1\right|=\left|x-2\right|\)
\(\Leftrightarrow\left[{}\begin{matrix}3x-1=x-2\\3x-1=-x+2\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}2x=-1\\4x=3\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=-\dfrac{1}{2}\\x=\dfrac{3}{4}\end{matrix}\right.\)