SOLUTION: im knew to algebra, and i don't know how to attack it, do u think u can help me out. 1. If the average of three numbers is V. If one of the numbers is Z and another is Y, what i

Algebra ->  Exponents -> SOLUTION: im knew to algebra, and i don't know how to attack it, do u think u can help me out. 1. If the average of three numbers is V. If one of the numbers is Z and another is Y, what i      Log On


   

Question 567073: im knew to algebra, and i don't know how to attack it, do u think u can help me out.
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

Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
Let X be the remaining number. Since the average of X,Y,Z is V, we have





Subtract Y+Z from both sides to isolate X.



This is the same as answer choice D.