SOLUTION: Hello What the average of 5 numbers is 92 When a sixth number was added the average became 90 What was the sixth number ?

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Question 779170: Hello What the average of 5 numbers is 92 When a sixth number was added the average became 90 What was the sixth number ?
Answer by rothauserc(4718) About Me  (Show Source):
You can put this solution on YOUR website!
s/5 = 92 and 5 * 92 = 460
(460 + x) / 6 = 90
multiply both sides of = by 6
460 +x = 6*90
460 +x = 540
x = 80