ta có \(\left|x-1\right|=3x+2\)
\(\Leftrightarrow\left[{}\begin{matrix}x-1=3x+2\\x-1=-3x-2\end{matrix}\right.\)
\(\Leftrightarrow\left[{}\begin{matrix}x-3x=2+1\\x+3x=-2+1\end{matrix}\right.\)
\(\Leftrightarrow\left[{}\begin{matrix}-2x=3\\4x=-1\end{matrix}\right.\)
\(\Leftrightarrow\left[{}\begin{matrix}x=-\frac{3}{2}\\x=-\frac{1}{4}\end{matrix}\right.\)
tick mk nhé, thanks