Final answer:
The question involves calculating the proportions of two solutions to create a mixture with a specific alcohol concentration, employing algebra. Without the alcohol percentages of Pretone and Pleak, a precise answer can't be provided using the mathematics of mixtures and concentrations.
Step-by-step explanation:
The question requires calculating the proportions of two solutions to create a final mixture with a specific concentration of alcohol. To solve this, we must apply the concept of mixtures in mathematics, using algebraic methods and units of volume measurement.
Without the concentration percentages of Pretone and Pleak, further calculations cannot be performed. However, the question might be hinting at a simple algebraic problem where essentially one would set up an equation based on volume and concentration ratios to find out the volumes required. Assuming Pretone and Pleak have different alcohol percentages, one way to set up the equation is:
If we let Pretone have an alcohol percentage P and Pleak have an alcohol percentage L, and the final desired percentage is 15%, for the mixture totaling 20 liters, we could use the equation: P x + L (20 - x) = 20 * 0.15, where x is the liters of Pretone.
Unfortunately, without the specific percentages of alcohol in Pretone and Pleak, we cannot give a precise answer to this problem. Also, the information provided after the problem seems unrelated to this specific mixture question.