Equilibrium is defined as:

Amarginal cost equals marginal revenue.

Cany point along the production possibilities curve.

Bexcess supply equals excess demand.

Dquantity demanded equals quantity supplied. user: equilibrium is defined as:

Amarginal cost equals marginal revenue.

Cany point along the production possibilities curve.

Bexcess supply equals excess demand.

Dquantity demanded equals quantity supplied.