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Mathematics 7 Online
OpenStudy (anonymous):

For his long distance phone service, Ivan pays a $7 monthly fee plus 7 cents per minute. Last month, Ivan's long distance bill was $13.93 . For how many minutes was Ivan billed?

OpenStudy (anonymous):

\[$7.00+$0.07x=$13.93\rightarrow $0.07x=$6.93\rightarrow x=99 \min\] the variable x=minutes

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