Respuesta :

Answer:

9x + 3m + 8n + 14

Step-by-step explanation:

Add all like terms.

7 -2 + 9 = 14

You can't do anything with the variables since they're all different.

9x + 3m + 8n + 14

Answer:

3m+8n+9x+14

Step-by-step explanation:

btw try math-way!! helps