The demand for books is: Qd=100-2P The supply of books is: Qs=2P What is the equilibrium price of books? A. 30 B. 20 C. 15 D. 25

To find the equilibrium price, we need to set the quantity demanded equal to the quantity supplied and solve for the price.<br /><br />Given:<br />$Qd = 100 - 2P$<br />$Qs = 2P$<br /><br />Setting $Qd$ equal to $Qs$:<br />$100 - 2P = 2P$<br /><br />Simplifying the equation:<br />$100 = 4P$<br /><br />Dividing both sides by 4:<br />$P = 25$<br /><br />Therefore, the equilibrium price of books is $25.<br /><br />The correct answer is D. 25.