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Here follow an occurence of a Fourier-Motzkin elimination.

fmf=[z<=4*x_1+ 3*x_2, x_1 + 3*x_2 <= 2100, 4*x_1+ 2*x_2<=1900, x_1<=200,x_2>=300, x_1 >=0,x_2 >=0]
fmf
fm_sol=solve_ineq(fmf,[x_1, x_2,z])
fm_sol

How can I select only the elements of the list where the operator for z is == ?

Here follow an occurence of a Fourier-Motzkin elimination.

fmf=[z<=4*x_1+ 3*x_2, x_1 + 3*x_2 <= 2100, 4*x_1+ 2*x_2<=1900, x_1<=200,x_2>=300, x_1 >=0,x_2 >=0]
fmf
fm_sol=solve_ineq(fmf,[x_1, x_2,z])
fm_sol

How can I select only the elements of the list where the operator for z is == ?

Here follow an occurence of a Fourier-Motzkin elimination.

fmf=[z<=4*x_1+ 3*x_2, x_1 + 3*x_2 <= 2100, 4*x_1+ 2*x_2<=1900, x_1<=200,x_2>=300, x_1 >=0,x_2 >=0]
fmf
fm_sol=solve_ineq(fmf,[x_1, x_2,z])
fm_sol

How can I select only the elements of the list generated by fm_sol where the operator for z is == ?