Question
Billy folded 60 paper cranes in three days. Each day after the first day, he folded 5 more paper cranes than the day before. How many paper cranes did he fold on the first day?
3 m

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Billy folded 60 paper cranes in three days. Each day after the first day, he folded 5 more paper cranes than the day before. How many paper cranes did he fold on the first day?