Question
Rael folded 66 paper boxes in three days. Each day after the first day, he folded 7 less paper boxes than the day before. How many paper boxes did he fold on the first day?
3 m

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Rael folded 66 paper boxes in three days. Each day after the first day, he folded 7 less paper boxes than the day before. How many paper boxes did he fold on the first day?