A chemist has three different acid solutions. The first acid solution contains 20 % acid, the second contains 40 % and the third contains 80 %. They want to use all three solutions to obtain a mixture of 55 liters containing 60 % acid, using 3 times as much of the 80 % solution as the 40% solution. How many liters of each solution should be used? The chemist should use liters of 20% solution, liters of 40% solution, and liters of 80% solution.
