Giải hệ phương trình
\(\left\{{}\begin{matrix}3x-y=5\\5x+2y=28\end{matrix}\right.\)
\(\left\{{}\begin{matrix}2x+y=3\\x+3y=4\end{matrix}\right.\)
\(\left\{{}\begin{matrix}3x+5y=1\\2x-y=-8\end{matrix}\right.\)
\(\left\{{}\begin{matrix}x-3y=5\\3x+4y=2\end{matrix}\right.\)