Use the Following General Linear Demand Relation to Answer Questions

Use the following general linear demand relation to answer questions 9 through 13:

where M is income and is the price of a related good, R.
-If M = $15,000 and = $20 and the supply function is , equilibrium price and quantity are, respectively,

A) P = $55 and Q = 195.
B) P = $6 and Q = 38.
C) P = $12 and Q = 200.
D) P = $50 and Q = 170.
E) P = $40 and Q = 250.