SOLUTION: The arithmetic mean of two numbers is A, and one of the numbers is N. Write a simplified expression for the other number.

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Question 252037: The arithmetic mean of two numbers is A, and one of the numbers is N.
Write a simplified expression for the other number.
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
let x = other number
(N+x)/2=A
N+x=2A
x=2A-N