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MacGuffins have a demand function of QD = 70 - P and a supply function of QS = 2P + 10. Determine the price at equilibrium PS = Imagine the market for Good X has a demand function of QDX = 100 - 2PX - 4PY + .05M +0.1AX, and a supply function of QSX = 4PX - 10, where PX is the price of Good X, PY is the price of Good Y, M is the average consumer income and AX is the amount spent to advertise Good X. If PY is $3, M is $24,000, AX is $500, find the equilibrium price of Good X. P* = MacGuffins have a demand function of QD = 70- P and a supply function of QS = 2P + 10. Determine the supply quantity when the price is $40. Imagine the market for Good X has a demand function of QDX = 100 - 2PX -4PY + 0.05M + 0.1AX and a supply function of OSX = 4PX - 10, where PX is the price of Good X, PY is the price of Good Y, M is the average consumer income and AX is the amount spent to advertise Good X. If the price of Good Y is $5, M is $5000 and AX is $10,000, find the equilibrium price of Good X