\(\Leftrightarrow\left\{{}\begin{matrix}2x-2y+2z=-6\\3x+2y+3z=6\\4x-2y-8z=6\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}5x+5z=0\\-2x+10z=-12\\x-y+z=-3\end{matrix}\right.\)
=>x=1; z=-1; y=3
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