Question
Kathy bought some erasers. She gave 15 of the erasers to her sister and sold 27 of the remaining erasers. After that, she bought another 300 erasers and had the same number of erasers that she bought at first. How many erasers did Kathy buy at first?
4 m

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Kathy bought some erasers. She gave 15 of the erasers to her sister and sold 27 of the remaining erasers. After that, she bought another 300 erasers and had the same number of erasers that she bought at first. How many erasers did Kathy buy at first?