\(x-2y+y=0\)
\(\Rightarrow2x-4xy+2y=0\)
\(\Rightarrow2x-4xy+2y-1=-1\)
\(\Rightarrow\left(2x-4xy\right)-\left(1-2y\right)=-1\)
\(\Rightarrow2x\left(1-2y\right)-\left(1-2y\right)=-1\)
\(\Rightarrow\left(2x-1\right)\left(1-2y\right)=-1\)
\(\Rightarrow\left[{}\begin{matrix}2x-1=-1;1-2y=1\\2x-1=1;1-2y=-1\end{matrix}\right.\)
\(\Rightarrow\left[{}\begin{matrix}x=0;y=0\\x=1;y=1\end{matrix}\right.\)
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