Question

D=100-2p, p is the price in dollars of the product and D is the number of products that can be sold at that price.

What price should be set in order to set in order to sell 75 items?

Answer 1

D=100-2p
P=price
D=products sold
in this case, the number of products you would want to sell is 75 so->
1) 75=100-2p
2) 75+2p=100
3) 100-75=2p
4) 25=2p
5) 25/2=p
6) p=12.50