Tìm $x$ để: $|2x - 1| = 5$

☆＊𝐦𝐭𝐮𝐲𝐭𝐭🎈＊

$\left|2x-1\right|=5$

$\left[\begin{matrix}2x-1=5 \\ 2x-1=-5\end{matrix}\right.$

$\left[\begin{matrix}2x=6 \\ 2x=-4\end{matrix}\right.$

$\left[\begin{matrix}x=3 \\ x=-2\end{matrix}\right.$

Vậy $x\in{\left\lbrace-2;3\right\rbrace}$.