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Mathematics 20 Online
OpenStudy (anonymous):

Isaac downloaded 7 ringtones. Each polyphonic ringtone costs $3.25, and each standard ringtone costs $1.50. If he spends a total of $21 on ringtones, find the number of polyphonic and standard ringtones he downloaded.

OpenStudy (anonymous):

6 polyphonic ringtones and 1 standard ringtone. I used guess and check

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