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. Ethanol Mixture Gallons Ethanol Concentration Total x percent Ethanol 20 x 12 percent Ethanol 60 0 point 1 2 7 point 2 Mixture 80 0 point 1 0 What is the value of x , the concentration of the unknown ethanol solution?