We have the next information
616 tickets were sold
x= adult tickets
y= student tickets
So we have the next equations
x+y=616
y=x+66
so we need to find x, substitute the second equation in the first equation
![x+x+66=616](https://img.qammunity.org/2023/formulas/mathematics/college/p9ki2zaxu64xgnyc2fj76zzhnpbl23q0k4.png)
then we need to isolate the x
![\begin{gathered} 2x+66=616 \\ 2x=616-66 \\ 2x=550 \\ x=(550)/(2) \\ x=275 \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/l9w0nobwh694y45cjar6rai0t5wb0uy4yh.png)
then for y, we substitute the value of x in the second equation
![y=275+66=341](https://img.qammunity.org/2023/formulas/mathematics/college/xrccbmrb78lzu13vn4hngxsauzxwaff28v.png)
adult tickets =275
student tickets= 341