a/ \(\left|2x-5\right|=x+2\)
\(\Leftrightarrow\left[{}\begin{matrix}2x-5=x+2\\2x-5=-x-2\end{matrix}\right.\)
\(\Leftrightarrow\left[{}\begin{matrix}2x-x=2+5\\2x+x=5-2\end{matrix}\right.\)
\(\Leftrightarrow\left[{}\begin{matrix}x=7\\3x=3\end{matrix}\right.\)
\(\Leftrightarrow\left[{}\begin{matrix}x=7\\x=1\end{matrix}\right.\)
Vậy -