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20240060020

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20240060020

Posted: Mon Feb 05, 2018 9:39 pm
by ada
$\begin{align}p-2q+4r-s&=-71\\2p-3q+10r-5s&=-161\\3p+5q+2r+s&=56\\5p-q+3r+2s&=-42\end{align}$
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