Answer:
The answer is: If the market for movie tickets is at an equilibrium point were QD=QS, then the price of a ticket without a tax is $7. With the new tax the price for a movie ticket will increase to 8$.
Explanation:
If the market is at an equilibrium point (without the new tax), then QS=QD, so:
4P - 19 = 30 - 3P
4P + 3P = 30 + 19
7P = 49
P = 7
The price of a movie ticket without the new tax is $7, with the new tax (+ 1$) the price will increase to 8$.