SOLUTION: Julie's scores on four Math tests were 78%, 98%, 67%, and 90%. What does Julie need to score on the fifth test so that her average will be 85%? Show work, so I can understand how t

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Question 895934: Julie's scores on four Math tests were 78%, 98%, 67%, and 90%. What does Julie need to score on the fifth test so that her average will be 85%? Show work, so I can understand how to do it please.
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
(0.78+0.98+0.67+0.90+x)/5=0.85
3.33+x=0.85*5
x=4.25-3.33
x=0.92
x=92%