SOLUTION: the average of four numbers is 82. when the fifth number was added the average became 83 what is the fifth number?

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Question 741665: the average of four numbers is 82. when the fifth number was added the average became 83 what is the fifth number?
Answer by tommyt3rd(5050) About Me  (Show Source):
You can put this solution on YOUR website!
(4/5)82+(1/5)x=83

which leads us to x=91

:)