(A) Introduce slack, surplus, and artificial variables and form the modified problem. (B) Write the preliminary simplex tableau for the modified problem and find the initial simplex tableau. (C) Find the optimal solution of the modified problem by applying the simplex method to the initial simplex tableau. (D) Find the optimal solution of the original problem, if it exists. (A) Introduce slack, surplus, and artificial variables and form the modified problem. Maximize P=9x₁ +7x2-Ma₁ subject to X₁ + X₂ S₁ + a₁ =2 -X₁+3x₂+ S₂ = 20 X₁, X2, S1, S2, a₁ 20 (B) Write the preliminary simplex tableau for the modified problem and find the initial simplex tableau. X₁ X2 $₁ a₁ $₂ P 1 $₂ 3 20 1 -1 Maximize subject to P=9x₁ +7: X₁ + X₂= -X₁ + 3x₂5 X₁, X₂2

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