A chemist has three different acid solutions. The first acid solu tion contains 15 % acid, the second contains 35 % and the third contains 65 % . They want to use all three solutions to obtain a mixture of 204 liters containing 25 % acid, using 2 times as much of the 65 % solution as the 35 % solution. How many liters of each solu tion should be used? The chemist should use liters of 15 % solution, liters of 35 % solution, and liters of 65 % solution.

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