The initial freshman class at a college is 10% smaller than last year’s class. But then during the first week of classes, 20 more students enroll. There are then 830 students in the freshman class.

Answer 1

number in last year's class ----- x
number in this year's class = .9x

after increase: number = .9x + 20

.9x + 20 = 830

solve for x

Now, is there a question?