I have a supply and demand schedule as follows

Price Quantity Demanded Quantity Supplied

20 95 30

40 90 40

60 85 50

80 80 60

100 75 70

120 70 80

How can I find the equilibrium price and quantity algebraically? I know I need to find demand and supply curve and I know how to find the slope, but I'm confused on how to get the whole equation, like the y-intercept.

Thanks!