`\text{~~Holi~~}`
`|-2x+4|=x-1`
`-> |-2x+4|-x=-1`
`->`\(\left[ \begin{array}{l}-2x+4-x=-1, -2x+4\geq0\\-(-2x+1)-x=-1, -2x+4<0\end{array} \right.\)
`->`\(\left[ \begin{array}{l}x=\dfrac{5}{3},x\geq2\\x=3,x<2\end{array} \right.\)
`->`\(\left[ \begin{array}{l}x=\dfrac{5}{3}\\x=3\end{array} \right.\)
`\text{Vậy}` `x_1= 5/3`, `x_2=3`
