Posted by Chris on Thursday, February 26, 2009 at 8:36pm.
argghhh! I don't like that method, however this page shows you step by step what to do
http://www.math.odu.edu/~bogacki/cgi-bin/lat.cgi?c=rref
enter: 3 rows, 4 columns, then
3 -5 5 1
5 -2 3 0
7 -1 1 5
Wow, thanks.
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