`a)|2x-1|=5`
`=>`\(\left[ \begin{array}{l}2x-1=5\\2x-1=-5\end{array} \right.\)
`=>`\(\left[ \begin{array}{l}2x=5+1\\2x=-5+1\end{array} \right.\)
`=>`\(\left[ \begin{array}{l}2x=6\\2x=-4\end{array} \right.\)
`=>`\(\left[ \begin{array}{l}x=6:2\\x=-4:2\end{array} \right.\)
`=>`\(\left[ \begin{array}{l}x=3\\x=-2\end{array} \right.\)