In order to find the market equilibrium set Qd= Qs which is equal to
100 - 10P = 50+10p
Subtracting 100 from both side you will get
- 10P = 10P +50 -100
- 10P = 10p -50
Now subtracting 10P from both sides you will get
- 10P - 10P = -50
-20p = -50
Dividing both sides by -20 you will get
-20/-20 P = -50/-20
P = 2.5 >>answer
Checking:
If P= 2.5 then
Qs = 10(2.5)+50
=25+50
=75
Qd = 100 - 10(2.5)
=100 - 25
= 75
Qs = Qd which is 75 = 75
100 - 10P = 50+10p
Subtracting 100 from both side you will get
- 10P = 10P +50 -100
- 10P = 10p -50
Now subtracting 10P from both sides you will get
- 10P - 10P = -50
-20p = -50
Dividing both sides by -20 you will get
-20/-20 P = -50/-20
P = 2.5 >>answer
Checking:
If P= 2.5 then
Qs = 10(2.5)+50
=25+50
=75
Qd = 100 - 10(2.5)
=100 - 25
= 75
Qs = Qd which is 75 = 75