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.
A store reduces the price of a computer by $20. Then during a 10% off sale, a customer pays $830.
Here are two equations:
0.9x + 20 = 830
0.9(x - 20) = 830
e
Questions:
a Decide which equation represents each story.
b. Explain why one equation has parentheses and the other doesn't.

PLEASE HELP ME RNNN