The expression p -15 is the amount you pay after using the coupon on a purchase of p dollars how much do you pay for a purchase of $83 pls

It has been given that P - 15 is the amount paid after using a coupon on a purchase amount of P dollar.

So, 15$ is the coupon discount.

So now we have the following:

Actual Price: P$

Discount : 15$

So for a purchase of 83$, you will have to pay:

83 - 15 = 68$     [Substituting P with 83]

justin bieber ml.