Question
Xuan spent 45 of her money on some cookies and 25 of her remaining money on 6 tarts. Each tart cost four times as much as a cookie. How many cookies did she buy?
4 m

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Xuan spent 45 of her money on some cookies and 25 of her remaining money on 6 tarts. Each tart cost four times as much as a cookie. How many cookies did she buy?