Cách khác:
ĐK: \(x\in R\)
\(pt\Leftrightarrow\sqrt{\left(2x-1\right)^2}=x+3\)
\(\Leftrightarrow\left|2x-1\right|=x+3\)
\(\Leftrightarrow\left[{}\begin{matrix}2x-1=x+3\\2x-1=-x-3\end{matrix}\right.\)
\(\Leftrightarrow\left[{}\begin{matrix}x=4\\x=-\dfrac{2}{3}\end{matrix}\right.\)