SOLUTION: a student averages 84 on five tests. if the student recieved grades of 84,82,81, and 79 on the first four exams,what grade did the student recieve on the fifth exam?

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: a student averages 84 on five tests. if the student recieved grades of 84,82,81, and 79 on the first four exams,what grade did the student recieve on the fifth exam?      Log On


   



Question 160944: a student averages 84 on five tests. if the student recieved grades of 84,82,81, and 79 on the first four exams,what grade did the student recieve on the fifth exam?
Answer by nerdybill(7384) About Me  (Show Source):
You can put this solution on YOUR website!
Let x = grade on fifth exam
.
Then because "a student averages 84 on five tests"
(84+82+81+79+x)/5 = 84
(326+x)/5 = 84
326+x = 425
x = 425-326
x = 99