Jonas bought 3 books. each book was the same price. he also used a coupon that takes $20 off the total cost. what expression can be used to represent the total purchase?

let x = the price of a book

 so you would have

 total = 3x-20

So if you have an equation which you do that consist of % and If you dont understand % just look over the percent as you would decimals @ 7.09 The pounds of chocolate run at a very hight rate for such So @ 5.00 Is the pound the % would be half of the total

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