The art museum had a total of 224 visitors on tuesday. visitors older than 18 paid $12 for admission. visitors 18 years or younger paid $8 for admission. the museum collected a total of $2,520. how many visitors were 18 or younger? . @agent0smith @mathstudent55 @ganeshie8 @thomaster @terenzreignz @hero

The art museum had a total of 224 visitors on Tuesday. Visitors older than 18 paid $12 for admission. Visitors 18 years or younger paid $8 for admission.
Now, the museum was able to collect 2 520 dollars. Let's find the number of adults and the number of young people.
Equation:
8u + 12o = 2520, where u is the number of younger and o is the number of above 18.
u + o = 224
-
o = u - 224
 
8u + 12(u - 224) = 2520
8u + 12u - 2688 = 2520
20u - 2688 = 2520
20u = 5208
u = 260.4