SOLUTION: if the number of sequence is 17 and the next number is 3,what is the first number?

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Question 963754: if the number of sequence is 17 and the next number is 3,what is the first number?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
I'm assuming it's a three number sequence,
{X, 17, 3}
Look at the difference from 17 to 3 which is -14.
And apply it to X.
X-14=17
X=31