At the movie theatre, child admission is $6.20 and adult admission is $9.80 . on monday, twice as many adult tickets as child tickets were sold, for a total sales of $593.40 . how many child tickets were sold that day?

x= child

2x = adult

6.20x +9.80(2x) =593.40

6.20x +19.6x=593.40

25.80x =593.40

x=593.40/25.80 = 23

 23 childrens tickets were sold

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