|2x-5|=1 tìm x ( giúp mình nha)

$|2x-5|=1$

⇒ \(\left[ \begin{array}{l}2x-5=1\\2x-5=-1\end{array} \right.\) 

⇒ \(\left[ \begin{array}{l}2x=1+5\\2x=-1+5\end{array} \right.\) 

⇒ \(\left[ \begin{array}{l}2x=6\\2x=4\end{array} \right.\) 

⇒ \(\left[ \begin{array}{l}x=3\\x=2\end{array} \right.\) 

Vậy S={2;3}