SOLUTION: 8=56 7=42 6=30 5=20 3=?what does 3 equal

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Question 793090: 8=56
7=42
6=30
5=20
3=?what does 3 equal
Found 2 solutions by rfer, acubed1234:
Answer by rfer(16322) About Me  (Show Source):
Answer by acubed1234(5) About Me  (Show Source):
You can put this solution on YOUR website!

I wrote out a general solution here . . . https://www.scribd.com/doc/260182194/Elementary-Sequences