October 2018 1 60 Report

Roziwąz układ równań:

\left \{ {\frac{2(x+y)}{5} - \frac{1}{2}=0,7(y-2)+0,4x} \atop {(\sqrt{8}-x\sqrt{2})(\sqrt{8}+y\sqrt{2})+2xy=0}} \right.


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