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In equilibrium, Qd = Qs

or, 100 - 0,5P = -20 + P

120=1,5P

or, P = 80

So, Equilibrium quantity , Q = Qd = Qs = 100 - 0,5х80 = 60 [аs, P = 80 unit.]

Answer: Equilibrium price is 80 unit and quantity is 60 unit.

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