SOLUTION: maurice has score of 88,90, and 80 on three test.what score must he make in his next test to have a mean score of exactly 85?

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Question 694022: maurice has score of 88,90, and 80 on three test.what score must he make in his next test to have a mean score of exactly 85?
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
(88+90+80+x)/4=85
258+x=85*4
x=340-258
x=82