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Mathematics, 04.10.2021 16:40 ella3714

At the beginning of the bake sale, Mary set aside 4 pies for herself. Karen then bought half of the remaining pies for her birthday party, and 12 more pies were sold during the sale. When the sale was over, there were 15 pies remaining. How many pies were there before the bake sale started? (Hint: Work Backwards)

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