A company produces fruity drinks that contain a percentage of real frit juce. Drink A contains 20% real fruit juice and drink b contains 5% real fruit juice. The company used 56.5 liters of real fruit juice to make 80 more liters of drink b than liters of drink a. Write a system of equations that could be used to determine the number of liters of drink a made and the number of liters of drink b made. Define the variable that you use to write the system