Answer:
68 tickets
Step-by-step explanation:
This is a problem that involves a system of equations, the first step is to define your variables and write equations to represent the situation.
x = number of advance tickets
y = number of door tickets
x + y = 184
3x + 5y = 688
Next, you need to solve for one variable, based on how these equations are written, the best method would be to solve by multiplication.
-3(x + y = 184) (multiply equation by -3)
-3x - 3y = -552
Now we need to combine the two equations together
3x + 5y = 688
-3x - 3y = -552
From here we can eliminate the x variable when subtracting the equations, this results in:
2 y = 136
y = 68
Therefore, 68 tickets were sold at the door.
