a)<=>\(\left[{}\begin{matrix}x-2=3\\x-2=-3\end{matrix}\right.< =>\left[{}\begin{matrix}x=5\\x=-1\end{matrix}\right.\)
b)<=>\(\left[{}\begin{matrix}x-3=2x-5\\-x+3=2x-5\end{matrix}\right.< =>\left[{}\begin{matrix}x=2\\x=\frac{8}{3}\end{matrix}\right.\)
c)\(\left[{}\begin{matrix}-2x=3x+4\\2x=3x+4\end{matrix}\right.< =>\left[{}\begin{matrix}x=4\\x=-4\end{matrix}\right.\)