We conclude that 515 student tickets were sold, and 58 adult tickets.
Let's define the variables:
We can write the system of equations:
x = 9*y - 7
x*5 + y*8 = 3039
Now we can replace the first equation into the second one:
(9*y - 7)*5 + y*8 = 3039
45y + 8y - 35 = 3039
53y = 3074
y = 3074/53 = 58
Now we can use:
x = 9y - 7 = 9*58 - 7 = 515
We conclude that 515 student tickets were sold, and 58 adult tickets.
If you want to learn more about systems of equations:
https://brainly.com/question/13729904
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