Answer: 2 Subway Tickets and 3 Express Bus Tickets
To solve this problem, you first need to write the following 2 equations.
6x + 4y = 24
3x + 7y = 27
Where x is the number of subway tickets and y is the number of bus tickets.
Now, you just have to solve the system of equations. You can use substitution, elimination or graphing. The easiest is graphing. There are online graphing calculators that will graph the points and you just need to find the point of intersection.