This Instructional Activity is a part of the Lesson 6, Unit 3, Grade 7. Read the problem as a class and give students time to set up their own expressions. Reconvene as a class to address each expression. At a store, a shirt was marked down in price. A pair of pants doubled in price. Following these changes, the price of every item in the store was cut in half. Write two different expressions that represent the new cost of the items, using for the cost of each shirt and for the cost of a pair of pants. Explain the different information each one shows.