SOLUTION: Mike's average on the first 2 exams is an 86. What must he earn on the next exam to raise his overall average to a 90?

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Question 820504: Mike's average on the first 2 exams is an 86. What must he earn on the next exam to raise his overall average to a 90?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

Mike's average on the first 2 exams is an 86. (172 Total)

What green%28x%29 must he earn on the next exam to raise his overall average to a 90?

%28172+%2B+x%29%2F3+=+90

         x = 270-172

         x = 98