Question
Penelope spent 3 days making some biscuits for sale. Each day, she made 20 more biscuits than the day before. She made a total of 144 biscuits. How many biscuits did she make on the first day?
3 m

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Penelope spent 3 days making some biscuits for sale. Each day, she made 20 more biscuits than the day before. She made a total of 144 biscuits. How many biscuits did she make on the first day?