Answer:
168
Step-by-step explanation:
You are given one equation that can be used to solve this problem. The other equation you need is ...
b = 82
Using this value in the given equation, you can find "a".
10.50a +3.75b = 2071.50 . . . . . . . given
10.50a +3.75·82 = 2071.50 . . . . . .using 82 for b
10.50a +307.50 = 2071.50 . . . . . . evaluated
10.50a = 1764 . . . . . . . subtract 307.50
a = 168 . . . . . . . . . . . . . divide by 10.50
168 adult tickets were sold.
