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The supply and demand equations for a product have been estimated to be: S : p...

The supply and demand equations for a product have been estimated to be: S : p = 5q − 3, D : p = −3q + 21 where p is the price in dollars per product and q is the quantity in thousands.

What is the equilibrium quantity?

Find the equilibrium price.

Shortage or surplus when the price is $7.5. Explain

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