Posted by colt on .
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