The demand for flatscreen TVs is P 3500 40QD The supply of
     The demand for flatscreen TVs is P = 3,500 - 40Q_D.  The supply of flatscreen TVs is P = 500 + 40Q_S.  What is the equilibrium price of a flatscreen TV and what is the equilibrium quantity of flatscreen TVs per day?  The equilibrium price is  per flatscreen TV, and the equilibrium quantity is  flatscreen TVs per day. 
  
  Solution
In equilibrium, demand = supply
3,500 - 40Q = 500 + 40Q
80Q = 3,000
Q = 3,000 / 80 = 37.5
P = 500 + 40Q = 500 + (40 x 37.5) = 500 + 1,500 = 2,000

