The demand and supply functions for good x are as

Question

The demand and supply functions for good X are as follows:

Q^D_x = 270 - 15 P_x 

Q^s_x = -50 + 25 P_x,

where Q^s_x is the quantity supplied of good X, Q^D_x is the quantity demanded of good X, and P_x is the price of good X. The equilibrium quantity and price of good X are

A. 160; 8.  

B. 175; 7.

C. 150; 8.

D. 150; 7.

E. none of the above.