Question
Betty spent 3 days making paper guns for her sisters. Each day, she managed to make 7 more paper guns than the day before. She made a total of 69 paper guns. How many paper guns did she make on the first day?
2 m

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Betty spent 3 days making paper guns for her sisters. Each day, she managed to make 7 more paper guns than the day before. She made a total of 69 paper guns. How many paper guns did she make on the first day?