Question

The inverse demand curve for product x is given by px=20−4·qx+2·py where px represents the price in dollars per unit, qx represents the rate of sales in pounds per week, and py represents the selling price of another product y in dollars per unit. The inverse supply curve of product x is given by px=10+2·qx

Determine the equilibrium price and sales of X

Let py=$10.

Determine whether x and y are substitutes or complements