SOLUTION: The average of 3 numbers is 6.5. Two of numbers are 7.1 and 5.4.what is the third number

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Question 696098: The average of 3 numbers is 6.5. Two of numbers are 7.1 and 5.4.what is the third number
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
(7.1+5.4+x)/3=3
12.5+x=3*3
x=9-12.5
x=-3.5