Question
1 file $4
1 story book $9
Eva had just enough money to buy 4 story books. However, she bought some files instead. How many files did she buy if she spent all her money?
4 m

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1 file $4
1 story book $9
Eva had just enough money to buy 4 story books. However, she bought some files instead. How many files did she buy if she spent all her money?