In the country And the demand for fabric is expressed by the equation Qd = 80-2P, and the supply of fabric Qs = 10+10P, where P is the price, CONV. den.ed.; Qd, Qs is the amount of fabric million a year In country B the supply and demand represented respectively by the equations Qd = 20-8P and Qs = 10+20P describe the condition of the fabric markets in countries A and B in the following situations the national economy is closed, i.e. fully isolated from other countries are integrated and formed a common market

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