all 20 spaces in my favorite parking lot are filled by vehicle some occupied by two wheeled motorcycles and other by cars each space is only one vehicle occupied it to calm myself I counted wheels amd there was exactly 66 how many cars and how many motorcycles have parked in my lot

Frank has a devised a formula for his catering business that calculates the number of meatballs he needs to prepare. the formula is m=4a+2c, where c=number of children; m=number of meatballs; a=number of adults. how many meatballs are required for a party of 10 adults and 5 children?