SOLUTION: the average of 5,9,10,13 and a equals 11.find the value of a?

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Question 54414: the average of 5,9,10,13 and a equals 11.find the value of a?
Answer by Nate(3500) About Me  (Show Source):
You can put this solution on YOUR website!
(5 + 9 + 10 + 13 + a)/5 = 11
14 + 23 + a = 55
37 + a = 55
a = 18