SOLUTION: On the first 4 tests of his math class, Ben got an average score of 84. What does he need on the next test to have an overall average of 87?

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Question 818332: On the first 4 tests of his math class, Ben got an average score of 84.
What does he need on the next test to have an overall average of 87?
Answer by TimothyLamb(4379) About Me  (Show Source):
You can put this solution on YOUR website!
(84)(4/5) + n(1/5) = 87
67.2 + n(1/5) = 87
n(1/5) = 19.8
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n = 99%
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