<pre> First step: Tableau #1 x y z s1 s2 s3 p 3 2 5 1 0 0 0 23 2 1 1 0 1 0 0 8 1 1 2 0 0 1 0 7 -4 -3 -2 0 0 0 1 0 </pre> Now I cheat and have Maple RREF it for me :)