math
posted by colt .
At the city museum, child admission $5.30 is and adult admission is $9.00. On Friday, three times as many adult tickets as child tickets were sold, for a total sales of $872.10. How many child tickets were sold that day?

math 
Reiny
children tickets  x
adult tickets  3x
9x + 5.3(3x) = 872.10
take over from here
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