At the movie theatre, child admission is $6.30 and adult admission is $9.60. On Sunday, twice as many adult tickets as child tickets were sold, for a total sales of $969.00. How many child tickets were sold that day?

I would use algebra to solve this:

let the amount of child ticket sold be x and the amount of adults ticket sold be 2x

so 2x•9.60 + x•6.30 = 969.00

19.2x+6.30x = 969.00

25.5 x = 969.00

x=38

hence ans is 38

an alternative solution would be:

9.60*2 + 6.30 = 25.5

969.00:25.5 = 38

the methods are actually almost the same.