Question
Dana bought 5k packets of mochi balls. Each packet contained 15 mochi balls. After eating 5 packets of mochi balls, how many mochi balls had she left? Give the answer in terms of k in the simplest form.
1 m

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Dana bought 5k packets of mochi balls. Each packet contained 15 mochi balls. After eating 5 packets of mochi balls, how many mochi balls had she left? Give the answer in terms of k in the simplest form.