Respuesta :

Answer:

12x+4

Step-by-step explanation:

when simplified you would get 12x + 4

−5−3(−5x−3)−3x

- 5 - ( - 15x - 9 ) - 3x

-5 + 15x + 9 - 3x

(-5 + 9) + (15x - 3x)

4 + 12x