Answer :
s + g = 350; /*(-3) => -3s - 3g = -1050;
3s + 5g = 1450;
=> 2g = 400 => g = 200 ( general admission tickets);
=> s = 350 - 200 => s = 150 ( student tickets);
3s + 5g = 1450;
=> 2g = 400 => g = 200 ( general admission tickets);
=> s = 350 - 200 => s = 150 ( student tickets);