The demand for aluminum is given by the equation Ed=500-5p+10i while the supply curve is given by the equation Q's=-400+50p. In both equations p denotes the market price and I denotes income.
A for what price is the market in equilibrium whine=10
B. What is the equilibrium quantity when I=10
C. Assume that the average income of consumers has fallen to 5 for what price is the market in equilibrium when I=5
D. What is the equilibrium quantity when I=5 or when the consumer average income falls
E. Depict your results graphically. You will need two graphs, one when I=5 and one when=10

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