Diketahui : Pd = 80 – 2Q dan Ps = -30 + 2Q kemudian dikenakan pajak 10/unit
Tentukan keseimbangan pasarnya ...
A. 30, 20
B. 25, 30
C. 20, 35
D. 40, 30
E. 30, 30
Pembahasan
Pd = 80 – 2Q dan Ps = -30 + 2Q
Dikenakan pajak 10/unit
Jawab :
Ps = -30 + 2Q – 10
= -40 + 2Q
Pd = Ps
80 – 2Q = -40 + 2Q
80 + 40 = 2Q + 2Q
120 = 4Q
Q = 120 : 4
Q = 30
PQ = 80 – 2Q
= 80 – 2 (30)
= 80 – 60
= 20
Jawaban: A