\(\left\{{}\begin{matrix}-2,1x+1,4y=3,5\\4,5x-2,25y=-2,4\end{matrix}\right.\)
\(\Leftrightarrow\left\{{}\begin{matrix}-4,5x+3y=7,5\\4,5x-2,25y=-2,4\end{matrix}\right.\)
\(\Leftrightarrow\left\{{}\begin{matrix}0,75y=5,1\\4,5x-2,25y=-2,4\end{matrix}\right.\)
\(\Leftrightarrow\left\{{}\begin{matrix}y=6,8\\4,5x-2,25\cdot6,8=-2,4\end{matrix}\right.\)
\(\Leftrightarrow\left\{{}\begin{matrix}y=6,8\\4,5x=-2,4+15,3\end{matrix}\right.\)
\(\Leftrightarrow\left\{{}\begin{matrix}y=6,8\\x=\dfrac{12,9}{4,5}\end{matrix}\right.\)
\(\Leftrightarrow\left\{{}\begin{matrix}y=6,8\\x=\dfrac{43}{15}\end{matrix}\right.\)