A rectangular patio has area of 180 square feet. The width of the patio is 3 feet less than the length. Find the length and width of the patio.

A) width * length = 180 OR width = 180 / length

B) width = length - 3

Substituting A) into B) we get

180 / length = length - 3

180 = length^2 - 3 * length

length^2 - 3 * length - 180 = 0

Factoring:

(len + 12) * (len - 15) = 0

length = 15

Therefore width = (length - 3) = 12

My calculations got to a decimal so it's about.