Respuesta :

gmany

Answer:

-4x + 9x

Step-by-step explanation:

Combine like terms:

-4x - 9x = (-4 - 9)x = -13x

4x - (-9x) = 4x + 9x = (4 + 9)x = 13x

-4x + 9x = (-4 + 9)x = 5x

4x - 9x = (4 - 9)x = -5x
-4x - 9 x
Is the answer