Answer:
(x+12)x(x-2)
Step-by-step explanation:
if there are 9 small boxes that contains 10 pens in each box that is a total of 90 pens. 2 large boxes which has 15 pens in each box that is a total of 30 pens. so all together you have 120 prizes. you need 200 so you subtract 120 from 200 which leaves you needing 80 prizes. your answer is 80 more prizes.
