Answer:
The price of one Balcony seat = $50
The price of one Ground level seat = $90
The price of one VIP seat = $180
Step-by-step explanation:
Let the price of one Balcony seat = $
Let the price of one Ground level seat = $
Let the price of one VIP seat = $
As per the given table:

Multiplying (1) with 2 and subtracting (2) from it:

Subtracting (3) from (1):

Multiply equation (5) with 12 and subtracting (4) from it:

By equation (5), putting value of
:

By equation (1), putting the values of 

Therefore, the answers are:
The price of one Balcony seat = $50
The price of one Ground level seat = $90
The price of one VIP seat = $180