SOLUTION: The average of two numbers is 60. If 40 is one of the numbers and it is removed from the set, what is the value of the other number?

Algebra ->  Average -> SOLUTION: The average of two numbers is 60. If 40 is one of the numbers and it is removed from the set, what is the value of the other number?      Log On


   

Question 858695: The average of two numbers is 60. If 40 is one of the numbers and it is removed from the set, what is the value of the other number?
Found 2 solutions by rothauserc, ben720:
Answer by rothauserc(4718) About Me  (Show Source):
You can put this solution on YOUR website!
let x be the other number
(40 + x) / 2 = 60
40 + x = 120
x = 80

Answer by ben720(159) About Me  (Show Source):
You can put this solution on YOUR website!
Let x=the other number
Because the average is 60, and the average is found by dividing the sum by the number of values,
%28x%2B40%29%2F2=60
To isolate x, multiply both sides by 2
x%2B40=120
Subtract 40 from both sides
x=80
The other number is 80