I can't seem to get this correct. The numbers I'm coming up with aren't making sense.

1 1 Suppose the supply and demand fer a certain texttmok are given by supply: p = if, demand: p = qu +20. where p is the price and q is the quantity. Find the demand quantity and the supply quantity at a price of $5. The number of books that are demanded at a price of $5 is (Round to the nearest whole number as needed.) 9 and the number of books supplied at a price of $5 is ID