$11: TAB has a standard tableau
$12: Start copy TAB and modify non standard constraints as shown! The equations contraints are processed first!
maximize_lp(0.16*x1+0.21*x2+0.33*x3+0.28*x4,
[ 2.1*x1+4.5*x2+0.0*x3+2.3*x4<=50400,
2.3*x1+0.0*x2+5.1*x3+2.9*x4<=54000,
2.6*x1+2.6*x2+3.3*x3+3.3*x4<=54000,
x1-x2>=0,
x1+x2=10000,
x3+x4=8000]),
nonegative_lp=true;
Maxmia-Link
https://sagecell.sagemath.org/?q=obelmx
