At a particular restaurant, each mozzarella stick has 90 calories and each onion ring
has 50 calories. A combination meal with mozzarella sticks and onion rings is shown
to have 960 total calories and 3 times as many mozzarella sticks as there are onion
rings. Determine the number of mozzarella sticks in the combination meal and the
number of onion rings in the combination meal.