SOLUTION: You have taken 4 tests and have an average of 75 points. If you score 100 on each of the rest of the tests, how many more tests do you need to take to raise your average to 80 poin

Algebra ->  Average -> SOLUTION: You have taken 4 tests and have an average of 75 points. If you score 100 on each of the rest of the tests, how many more tests do you need to take to raise your average to 80 poin      Log On


   

Question 586857: You have taken 4 tests and have an average of 75 points. If you score 100 on each of the rest of the tests, how many more tests do you need to take to raise your average to 80 points?
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
(4 * 75) + (x * 100) = (4 + x) * 80