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(799(x−y)+800(y−z)+801(z−x)=0638401(x−y)+640000(y−z)+641601(z−x)=800\begin{array}{c}(799(x-y)& +& 800(y-z)& + &801(z-x) & =0 \\ 638401(x-y) & + & 640000(y-z) & +& 641601(z-x) & =800 \end{array}(799(x−y)638401(x−y)++800(y−z)640000(y−z)++801(z−x)641601(z−x)=0=800
If x,y,zx,y,zx,y,z satisfy the above system of equations then find the value of x−2y+zx-2y+zx−2y+z.
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