## Elementary Algebra

Let p represent the original price of thepurse. We can use the basic discount guideline to set up an algebraic equation. Original selling price - Discount = Discount sale price Original selling price = p Discount = 20% $\times$ p = 0.2p Discount sale price = 180 So, p - 0.2p = 180 0.8p = 180 Divide both sides by 0.8. p = 225 The original price of the purse was 225 dollars.