Suppose that the monthly demand function of a particular commodity is given by P= 200 -0.4x and the supply function is P = 0.2x + 80 where x is the number of units demanded and supplied and P is in pesos. a.) Determine the equilibrium prics and quantity b.) At a unit prices of P 140, by how many unit does supply exceed demand. c.) At a unit prices of P 90, by how many unit does demand exceed supply.

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