Mathematics, 14.01.2020 09:31 F00Dislife

Tickets to a concert cost $10 in advance and $15 at the door. if 120 tickets were sold for a total of $1390, how many of the tickets were purchased in advance?

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Tickets to a concert cost $10 in advance and $15 at the door. if 120 tickets were sold for a total o...

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