SOLUTION: The average of 4 numbers is 14. If the average of 3 of these numbers is 12, what is the fourth number?

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Question 1095028: The average of 4 numbers is 14. If the average of 3 of these numbers is 12, what is the fourth number?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
[ average ] = [ sum of numbers ] / [ how many numbers ]
+14+=+S%5B1%5D+%2F+4+
+S%5B1%5D+=+56+
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For 3 of the numbers:
+12+=+S%5B2%5D+%2F+3+
+S%5B2%5D+=+36+
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+S%5B1%5D+-+S%5B2%5D+=+56+-+36+
+S%5B1%5D+-+S%5B2%5D+=+20+
The 4th number is 20