Question: Problems 21 have nonunique solutions. If there is no solution, indicate this; if there are multiple solutions, find two different solutions. Use the simplex method,

Problems 21 have nonunique solutions. If there is no solution, indicate this; if there are multiple solutions, find two different solutions. Use the simplex method, with x ≥ 0, y ≥ 0.

21. Maximize f = 2x + 5y subject to - 4x +

21. Maximize f = 2x + 5y subject to - 4x + y 40 x - 7y 70

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