SOLUTION: the average of 3 days temperatures is 102.26 the first day is 120.25 the second day is 94.45 the third is x I don't quite understand how to find x when the average is part of t

Algebra ->  Average -> SOLUTION: the average of 3 days temperatures is 102.26 the first day is 120.25 the second day is 94.45 the third is x I don't quite understand how to find x when the average is part of t      Log On


   



Question 32620: the average of 3 days temperatures is 102.26
the first day is 120.25
the second day is 94.45
the third is x
I don't quite understand how to find x when the average is part of the known numbers

Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
Recall, the average (mean) of a set of numbers is the sum of the numbers divided by how numbers there are.
So, if we add up (sum) the temperatures for the 3 days and divide by 3 we get the average temperature for those days.
%28120.25+%2B+94.45+%2B+x%29%2F3+=+102.26 Solve for x. Multiply both sides by 3.
214.7+%2B+x+=+306.78 Subtract 214.7 from both sides.
x+=+92.08