If a book costs $15 and you have a coupon for $5 off, how much do you pay?

To find out how much you will pay for the book after applying the coupon, you first take the original price of the book, which is $15, and subtract the value of the coupon, which is $5.

This calculation looks like this:

[

15 - 5 = 10

]

After applying the coupon, the price is reduced to $10. Therefore, the amount that you pay for the book, after using the coupon, is indeed $10. This reinforces the concept of subtraction within the context of discounts, demonstrating how coupons can effectively lower the price of items.