`(2x-1)/-12 = -3/(2x-1)`
`=> (2x-1)(2x-1) = -3.(-12)`
`=> (2x-1)^2 = 36`
`=>` \(\left[ \begin{array}{l}(2x-1)^2=6^2\\(2x-1)^2 =(-6)^2\end{array} \right.\)
`=>` \(\left[ \begin{array}{l}2x-1=6\\2x-1=-6\end{array} \right.\)
`=>` \(\left[ \begin{array}{l}2x = 7\\2x=-5\end{array} \right.\)
`=>` \(\left[ \begin{array}{l}x=7/2\\x=-5/2\end{array} \right.\)
Vậy `x= 7/2` hoặc `x= -5/2`