A farmer ha 1,280 acre of land on which he grow corn, wheat, and oybean. It cot $45 per acre to grow corn, $60 to grow wheat, and $50 to grow oybean. Becaue of market demand the farmer will grow twice a many acre of wheat a of corn. He ha allocated $67,900 for the cot of growing hi crop. How many acre of each crop hould he plant?
