Assume that the production of 1 unit of magnesium requires 0.4 units of magnesium and 0.4 units of aluminum, and that the production of 1 unit of aiuminum requires 0.2 units of magnesium and 0.7 units of aluminum Find the production schedule that satisfies an external demand for 30 units of magnesium and 90 units of aluminum. X =

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