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

Find the optimal value of the objective function for the following problem by inspecting only 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

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