SOLUTION: 1. If the average of three numbers is V. If one of the numbers is Z and another is Y, what is the remaining number? A. ZY - V B. Z/V - 3 - Y C. Z/3 - V - Y D. 3V- Z - Y E. V

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: 1. If the average of three numbers is V. If one of the numbers is Z and another is Y, what is the remaining number? A. ZY - V B. Z/V - 3 - Y C. Z/3 - V - Y D. 3V- Z - Y E. V      Log On


   

Question 340389: 1. If the average of three numbers is V. If one of the numbers is Z and another is Y, what is the remaining number?
A. ZY - V
B. Z/V - 3 - Y
C. Z/3 - V - Y
D. 3V- Z - Y
E. V- Z - Y

Please help me understand the step to solve this problem.
Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
The average of three numbers is found by adding the three numbers and dividing the sum by three. Let'a call the remaining number x, so we can express the average
%28Z%2BY%2Bx%29%2F3+=+V Solve for x. Multiply both sides by 3.
Z%2BY%2Bx+=+3V Now subtract Z and Y from both sides.
x+=+3V-Z-Y
The remaining number is highlight%283V-Z-Y%29