Question 1096650
r = number of regular tickets
s = number of student tickets
m = number of matinee tickets


r + s + m = 8500
8.5r + 6s + 5m = 64600
s = 2m


Plug the third equation (s = 2m) into the other equations.


r + 3m = 8500
8.5r + 17m = 64600


You can use any method (substitution, elimination, graphing) to solve for r and m. Plug those values back into the first equation and you are done.