Original formula =- 3x-5xy 3y/x-3xy y

=- 3(x y)-5xy/(x y)-3xy

=- 3(x y)- 15(x y)/(x y)-9(x y)

=- 12(x y)/8(x y) If the upper and lower parts are both negative, then round them off.

=-3/2

I hope the landlord will adopt the answer.