Respuesta :

4xy + 9x - 3y + z + xy

 Combine Like Terms
 =4xy+9x+3y+z+xy

   =(4xy+xy)+(9x)+(3y)+(z)

   =5xy+9x+3y+z


Answer =5xy+9x3y+z


I hope this helps, can I get brainliest thanks
4xy+9x-3y+z+xy is 3y