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Equations & Systemshard
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For the system {x+2y+z=52x−y+3z=4\begin{cases} x + 2y + z = 5 \\ 2x - y + 3z = 4 \end{cases}{x+2y+z=52x−y+3z=4​ with z=2z = 2z=2, what is x+yx + yx+y?