Optimal value of the objective function

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Find the optimal value of the objective function for the following problem by only inspecting its dual. (Do not solve the dual by the simplex method)

minimize z = 10x1 + 4x2 +5x3

subject to   5x1 - 7x2 + 3x3 >= 50

                     x1, x2, x3 >= 0

Reference no: EM13166971

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