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