I hope these are the questions you meant. Refered to link provided by Mrittik
51(c)
Y = 3200 + 4000 + 800 - (1/10)Y + 0.5(Y - 2/5Y)
Find Y
52(b)
At Y = 10,000
M = 1000
and X = 800 (autonomous)
so there is a trade deficit of 200
53) (d)
To balance Trade, i need X = M => 800 = (1/10)Y => Y = 8000
So to find t,
8000 = 3200 + 4000 + 800 - 800 + 0.5(8000 - 8000t)
=> 800 = 4000(1-t)
=> 0.2 = 1 - t
=> t = 0.8 = 4/5
So we need to increase the previous tax rate to 4/5
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