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35. permintaan
P1 = 5.000
Q1 = 1.500

P2 = 6.500
Q2 = 1.200

Pd = a + bQ
5000 = a + 1500b
6500 = a + 1200b
_______________ -
-1500 = -300 b
-1500/-300 = b
5 = b

5000 = a + 1500(5)
5000 = a + 7500
-2500 = a

Pd = -2.500 + 5Q

Penawaran
P1 = 5000
Q1 = 500

P2 = 6500
Q2 = 700

Ps = a + bQ
5000 = a + 500b
6500 = a + 700b
______________ -
- 1500 = -200b
-1500/-200 = b
7,5 =b

5000 = a + 500 (7.5)
5000 = a + 3750
1250 = a

Ps = 1.250 + 7.5Q

Pd = Ps
-2500 + 5Q = 1250 + 7.5Q
5Q - 7.5Q = 1250 + 2500
-2.5Q = 3750
Q = 3750/2.5
Q = 1500

P = -2.500 + 5(1.500)
= -2.500 + 7.500
= 5.000 (A)

no 36
Qd = Qs
-P + 16 = -8 + P
16 + 8 = P + P
24 = 2P
24/2 = P
12 = P

Q = -P + 16
= - 12 + 16
= 4

(4,12)