Respuesta :

3m-3.
basically since 6 and -9 don’t have any variables, you would ignore the 3m to combine them like 6-9, which would be -3 and then adding that onto the 3m you would get 3m-3

Answer: 6 + 3 − 9  

  − 3 + 3  

 -3+3m    

 3m-3

Step-by-step explanation: