Question 272479
At the movie theatre, child admission is 5.30 an adult admission is 9.10. On Monday, 159 tickets were sold for a total sales of 1120.10, how many adult tickets were sold that day?

Let a be the number of adult tickets and c the number of children's tickets. Then we have:

1.) a + c = 159
2.) 9.10*a + 5.30*c = 1120.10

From 1.) we have a = 159 - c.

Substitute 159 - c for a in equation 2.)and solve for c:

9.10*(159-c) + 5.30*c = 1120.10

Once the value for c is determined then a = 159 - c.