SOLUTION: The number of terms in the arithmetic sequence: 5,18,31,44...161 is?

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Question 1090779: The number of terms in the arithmetic sequence: 5,18,31,44...161 is?
Answer by josgarithmetic(39630) About Me  (Show Source):
You can put this solution on YOUR website!
5%2B13%28n-1%29 is each general term. n is for the term index.

5%2B13%28n-1%29=161-----solve for n.