a, \(3x=-6\Leftrightarrow x=-2\)
b, \(\left[{}\begin{matrix}2x+1=0\\x-1=0\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=-\dfrac{1}{2}\\x=1\end{matrix}\right.\)
c, đk x khác 0 ; 3/2
\(x-3=5\left(2x-3\right)\Leftrightarrow x-3=10x-15\Leftrightarrow9x=12\Leftrightarrow x=\dfrac{4}{3}\left(tm\right)\)