https://adamaths.com/forum/
20240060020
https://adamaths.com/forum/viewtopic.php?f=117&t=5825
Page
1
of
1
20240060020
Posted:
Mon Feb 05, 2018 9:39 pm
by
ada
$\begin{align}p-2q+4r-s&=-71\\2p-3q+10r-5s&=-161\\3p+5q+2r+s&=56\\5p-q+3r+2s&=-42\end{align}$