A library is having a book sale to raise money. Hard cover books cost $4 each and paperback books cost $2 each. A person spends $26 for eight books. How many hard cover books did she purchase?

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I don't really know how to explain, but I will give you the straight up answer

5 HARDCOVER BOOKS (would total up to $20)
3            paperback books (would total up to $6)