SOLUTION: If the average of three numbers is V. If one of the numbers is Z and another is Y, what is the remaining number?

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Question 891181: If the average of three numbers is V. If one of the numbers is Z and another is Y, what is the remaining number?
Found 2 solutions by AnlytcPhil, Alan3354:
Answer by AnlytcPhil(1806) About Me  (Show Source):
You can put this solution on YOUR website!
If the average of three numbers is V. If one of the numbers is Z and another is Y,
what is the remaining number?
Let X = the remaining number.  Then to find the average of three numbers
you add them and divide by 3:

%28X%2BY%2BZ%29%2F3%22%22=%22%22V

X%2BY%2BZ%22%22=%22%223V

X%22%22=%22%223V-Y-Z

Edwin

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
If the average of three numbers is V. If one of the numbers is Z and another is Y, what is the remaining number?
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n = remaining number
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(Y + Z + n)/3 = V
Y + Z + n = 3V
n = 3V - Y - Z