Two friends, Nayeli and Aiden, had just bought their first cars. The equation y=22.8xy=22.8x represents the number of miles, yy, that Nayeli can drive her car for every xx gallons of gas. Aiden uses 5 gallons of gas to drive 210 miles in his car. How many miles less does Nayeli's car travel on one gallon of gas than Aiden's car?