A chemist has three different acid solutions. The first acid solution contains 20 % acid, the second contains 35 % and the third contains 55 %. They want to use all three solutions to obtain a mixture o 216 liters containing 30 % acid, using 3 times as much of the 55 % solution as the 35 % solution. Ha many liters of each solution should be used? The chemist should use liters of 20 % solution, liters of 35 % solution, an liters of 55 % solution.

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