the area of a carpet is 36x2y-9xy square inches. if the width is 3xy inches, what is the length of the carpet

Respuesta :

Divide the area by the width to get the length. 
Length = 36x^2y-9xy / 3xy.
            =  (36x^2y/3xy) - (9xy/3xy)
            =  12x-3