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A theater charges $9 for an adult ticket and $4 for a child ticket.
All 1020 tickets were sold and $7680 of revenue was brought in.
How many adult tickets were sold?

Respuesta :

nicolina
x - number of adult tickets
y - number of child tickets

9x + 4y = 7680
x + y = 1020
y = 1020 - x
9x + 4(1020 - x) = 7680
9x + 4080 - 4x = 7680
9x - 4x = 7680 - 4080
5x = 3600
x = 3600/5
x =720
720 adult tickets were sold.
SamVictorSam
720 adult tickets were sold and 300 kid tickets were sold

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