Given the demand function QD=100−2P and the supply

Solution

To find the equilibrium price and quantity, we set the quantity demanded equal to the quantity supplied (QD=QS). • Set Demand equal to Supply: 100−2P=3P−50 • Solve for P (Price): Add 2P to both sides: 100=5P−50 Add 50 to both sides: 150=5P Divide by 5:  P=150/5  P=30 So, the equilibrium price is 30. • Substitute P back into either the Demand or Supply equation to find Q (Quantity): Using the Demand function: QD=100−2P  QD=100−2(30)  QD=100−60  QD=40 Using the Supply function (to verify): QS=3P−50  QS=3(30)−50  QS=90−50  QS=40 Both equations yield an equilibrium quantity of 40. Therefore, the equilibrium price is 30 and the equilibrium quantity is 40.