Frank has 7 one-dollar bills, 4 five-dollar bills, 2 ten-dollar bills, and 1 twenty-dollar bill. He goes to buy peanuts, which cost $3 a pound. He buys what he wants and has $4 in change. He plans to eat the peanuts all in one week. How many pounds does he eat on average per day? Let's answer step by step:
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Frank has $7 in one dollar bills because 7 x 1 = 7. Frank has $20 in five dollar bills because 4 x 5 = 20. Frank has $20 in ten dollar bills because 2 x 10 = 20. Frank has 67 dollars in total because 7 + 20 + 20 + 20 = 67. Frank spent $63 because 67 - 4 = 63. Frank bought 21 pounds of peanuts because 63 / 3 = 21. He eats 3 pounds a day on average because 21 / 7 = 3. The answer: 3.
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