Consider the following linear programming problem: Maximize z = 6x + 10y Subject to x ≤ 4 y ≤ 6 3x + 2y ≤ 18 x ≥ 0, y ≥
We can see that we verify 72 by full calculation: use standard identity, substitute, simplify step by step to reach 72.
Ref: NCERT Mathematics Class XII — Linear Programming
