so 2 for a freshman ticket and 5 for everyone else
so equation 1
y + x = 750
equation 2
2y + 5x = 3210
we can plug in now after we simplify
y = 750 - x
2y = 1500 - 2x
now we plug in to equation 2
1500 - 2x + 5x = 3210
1710 = 3x
1710 / 3 = x
x = 570
now plug back in to first equation
570 + y = 750
y = 180