A chemist has three different acid solutions. The first acid solution contains
20% acid, the second contains 35% and the third contains 80%. He wants to use all three solutions to obtain a mixture of 54 liters containing 55% acid, using 2 times as much of the 80% solution as the 35% solution. How many liters of each solution should be used?
The chemist should use liters of 20% solution, liters of 35% solution, and liters of 80% solution.