SOLUTION: The 5th term of an arithmetic sequence is 10 an 7th term is 18. What is the 8th term?

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Question 699384: The 5th term of an arithmetic sequence is 10 an 7th term is 18. What is the 8th term?
Answer by reviewermath(1029) About Me  (Show Source):
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d+=+%2818+-+10%29%2F%287+-+5%29
d = 4
The 8th term is 4 more than the 7th term
Answer: 22