Tim had 187 dollars to spend on 9 books. After buying them he had 18 dollars. How much did each book cost?

Question

Tim had 187 dollars to spend on 9 books. After buying them he had 18 dollars. How much did each book cost?

0

Answers ( No )

    0
    2021-09-10T17:36:25+00:00

    Information

    Tim had $187 dollars to spend.

    Tim buys 9 books.

    Tim has $18 dollars left after buying 9 books.

    Steps

    First, subtract the total amount of dollars Tim has to spend with his remaining balance after purchasing the books to find the total amount of cash spent on books.

    $187 (total spending) – $18 (remaining balance) = $169 (spent on books)

    Then, divide the amount of cash spent on books with the amount of books bought.

    $169 (spent on books) รท 9 (books) = $18.77 (cost per book)

    Quick note: You don’t round up since this is dealing with cash. You can only round down, but leave to 2 decimal places (to the hundredths place) for a precise amount.

    Conclusion

    Tim spent $18.77 on each book.

    0
    2021-09-10T17:37:01+00:00

    Each book costed about $18.77

    To do this problem do this:

    9b = 187 – 18

    This is because since you have 18 dollars left over subtract it from the total amount of money you had before.

    9b = 169

    Divide:

    b = $18.77

    To check you work multiply in 18.77, 9 times and add 18 dollars to it:

    18.77(9) = 169

    169 + 18 = 187

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