SOLUTION: If you earn a score of 72% on one exam and a score of 85% on another exam, what will you need to earn on the next exam so that your average for the three exams is 80%?

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: If you earn a score of 72% on one exam and a score of 85% on another exam, what will you need to earn on the next exam so that your average for the three exams is 80%?       Log On


   

Question 160137: If you earn a score of 72% on one exam and a score of 85% on another exam, what will you need to earn on the next exam so that your average for the three exams is 80%?
Answer by nabla(475) About Me  (Show Source):
You can put this solution on YOUR website!
(.72+.85+x)/3=.8
1.57+x=2.4
x=.83.
You need an 83%.