A store advertises that you can take 30% off the purchase of any item in the store. If you pay $78.40 (disregarding tax) on an item, what was the original price? (Define your unknowns, set up and solve an equation to answer this question)A store advertises that you can take 30% off the purchase of any item in the store. If you pay $78.40 (disregarding tax) on an item, what was the original price? (Define your unknowns, set up and solve an equation to answer this question)