Diketahui p1=140 , p2=170 , QD1=54, QD2=42, QS1=10, QS2=20. Hitunglah titik keseimbangan dari data tersebut

fungsi permintaan
P - P1 / P2 - P1 = Q - Qd1 / Qd2 - Qd1
P - 140 / 170 - 140 = Q - 54 / 42 - 54
P - 140 / 30 = Q - 54 / -12
-12P +1680 = 30Q - 1620
-12P - 30Q = -1680 - 1620
- 12P -30Q = -3300
30 Q = -12P + 3300
Qd = -0,4P + 110

fungsi penawaran
P - P1 / P2 - P1 = Q - Qs1 / Qs2 - Qs1
P - 140 / 170 - 140 = Q - 10 / 20 - 10
P - 140 / 30 = Q - 10 / 10
10P - 1400 = 30 Q - 300
10P = 30Q + 1100
- 30Q = -10P + 1100
-3Q = -P + 110
Ps = 3Q + 110
Qs = 0,33P + 36,67

Qs = Qd
0,33P + 36,67 = -04P + 110
0,33P + 0,4P = 110 + 36,67
0,73P = 146,67
P = 146,67 / 73
P = 2,009

-0,4P + 110 = Q
-0,4 (2,009) + 110 = Q
-0,803 + 110 = Q
Q = 109,197

Jadi titik keseimbangan (Q,P)
(109,197 ; 2,009)


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*semoga membantu* :)