Respuesta :

Answer: 2x + x = 3x / -8 + 17 = 9

3x + 9

Step-by-step explanation:

This is a expression that can not be answered because they do not have the same variable, so that is your answer.

Answer:

3(x + 3)

Step-by-step explanation:

2x - 8 + x + 17

3x - 8 + 17

3x + 9

3(x + 3)