Algebra of Supply & Demand - ECON 101: THE BASICS
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3. Equilibrium Equilibrium is defined as the price at which quantity supplied equals quantity demanded.We have a demand function, : P = 90 – 3QD, and a supply function P = 20 + 2QS. In equilibrium, QS = QD; there is one unique price at which this occurs.We will solve for the equilibrium quantity, Q*, by setting these equations equal to each other since the equilibrium …
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