Dana decides to paint the ceiling and the walls of a room. she spends $120 on 2 gallons of a paint for the ceiling and 4 gallons of paint for the walls. then she decides to paint the ceiling and the walls of another room using the same kinds of paint. she spends $60 for 1 gallon of paint for the ceiling and 2 gallons of paint for the walls. a gallon of ceiling paint cost $3 more than a gallon of wall paint. how much is one gallon of each type of paint?

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