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Mathematics, 02.09.2019 18:50 isabelsmhl

Afamily purchased tickets for a concert. they paid a total of $90 for 7 adult tickets and 12 child tickets. the price of a child ticket was two-thirds the price of an adult ticket . how much was the price of an adult ticket

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Afamily purchased tickets for a concert. they paid a total of $90 for 7 adult tickets and 12 child t...
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