In a basketball game, Penny made 16 total baskets and scored 39 total points. Each of the baskets she made were either 2-point or 3-point baskets. How many 2 point baskets, and 3 point baskets did Penny make?
If all were 2-points, then Penny's score would be 32. It is 7 more than that, so she must have made 7 3-point baskets. (Each adds 1 more point than a 2-point basket.) The remaining 9 were 2-point baskets.