SOLUTION: why is it when three consecutive numbers are added together, the answer is always the same as the middle number multiplied by three?

SOLUTION: why is it when three consecutive numbers are added together, the answer is always the same as the middle number multiplied by three?

Algebra.Com

Question 351500: why is it when three consecutive numbers are added together, the answer is always the same as the middle number multiplied by three?
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
It is because the middle number is the average of the three numbers.
there are three numbers.
so average * 3 = sum of three consecutive numbers.
...
m.ananth@hotmail.ca
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