Avery uses a blend of dark chocolate and milk chocolate to make the ice cream topping at her restaurant. She wants to buy 10 kg 10kg10, start text, k, g, end text more of dark chocolate than milk chocolate, and she needs 150 kg 150kg150, start text, k, g, end text of chocolate in total for her next order. Let d dd be the number of kilograms of dark chocolate he buys and m mm be the number of kilograms of milk chocolate she buys. Which system of equations represents this situation?