Maki uses 20 gallons of a solution with an unknown ethanol concentration and 60 gallons of a 12% ethanol solution to make 80 gallons of a 10% solution. The table shows the amount of each solution. A table titled Ethanol Mixture, showing Gallons, Ethanol Concentration, and Total. The first row shows x percent Ethanol, 20, x, and blank. The second row shows, 12 percent Ethanol, 60, 0.12, and 7.2 The third row shows Mixture, with 80, 0.10, and blank.