SOLUTION: I had a question like this "if you have an 85, 78, 90, and an 86, what score do I need to have an average of 89." How do I solve this?

Question 517307: I had a question like this "if you have an 85, 78, 90, and an 86, what score do I need to have an average of 89." How do I solve this?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
What should your next score be?
Let the next score =
The definition of average is:
( sum of the scores ) / ( number of tests )
average =

You need a score of 106
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