At the city museum, child admission is $5.20 and adult admission is $9.20. On Wednesday, 150 tickets were sold for a total sales of 996.00. How many adult tickets were sold that day?
Explanation: You can call “c” the number of children and “a”of adults; you get: 5.20c + 8.50a = 1097.60
and
a =4c meaning that the number of adults was four times the children. Substituting this value of “a” into the first equation we get: 5.2c + 8.5(4c) = 1097.6 5.2c + 34c = 1097.6
