The equilibrium price and quantity are the only price and quantity that are stable in a free market.

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In a free market, the equilibrium price and quantity are determined by the interaction of supply and demand. At this price and quantity, buyers and sellers are both satisfied with their transactions, and there is no external force pushing the market towards a different price or quantity. Therefore, the equilibrium price and quantity represent a stable outcome for the market. Any deviation from this point would prompt market forces to adjust and return to equilibrium.

The Equilibrium Price and Quantity Are the Only Price and Quantity