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Answer:X + Y = 180X = 3YAcres of corn: 135Acres of wheat: 45Step-by-step explanation:X = number of acres of cornY = number of acres of wheat"A farmer plants corn and wheat on a 180-acre farm."X + Y = 180"The farmer wants to plant three times as many acres of corn as wheat."X = 3YX + Y = 180X = 3Y3Y + Y = 1804Y = 180Y = 45X = 3Y = 3(45) = 135X = 135Acres of corn: 135Acres of wheat: 45...