When P = $65,the quantity demanded of a good is 80 units,and the quantity supplied of the good is 40 units.For every $10 increase in the price of this good,quantity demanded falls by 10 units and quantity supplied rises by 10 units.The equilibrium price of this good is ___________and the equilibrium quantity of this good is _________ units.
A)$55;30
B)$75;50
C)$75;70
D)$85;50
E)$85;60

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The Answer of When P = $65,the quantity demanded of a good is 80 units,and the quantity supplied of the good is 40 units.For every $10 increase in the price of this good,quantity demanded falls by 10 units and quantity supplied rises by 10 units.The equilibrium price of this good is ___________and the equilibrium quantity of this good is _________ units.
A)$55;30
B)$75;50
C)$75;70
D)$85;50
E)$85;60

When P = $65,the Quantity Demanded of a Good Is