Minimize subject to
C = -5x1 + 10x2 - 15x3
2x1 + 3x2 - x3 ≤ 24
x1 - 2x2 - 2x3 ≥ 1
x1, x2 , x3 ≥ 0
Problem are mixed. Some can be solved by the methods presented in Sections 6-2 and 6-3, while others must be solved by the big M method.