The supply and demand of textile materials at Surabaya Show in the function below:
Qd = 180 – 20P
Qs = -20 + 5P
Based on those two functions, the equilibrium price of textile material in Surabaya is ....
A. 3
B. 5
C. 7
D. 8
E. 10
Jawabannya D. Karna :
Qd=Qs
180-20P=-20+5P
-2OP-5P=-20-180
-25P=-200
P=-200/-25P
P= 8 (bagian D)
D. 8 dgn menggunakan persamaan Qd=Qs
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