Respuesta :

3(4x + 6) - 9x

Apply the Distributive Property:
3 (4x) + 3 * 6 - 9x

Multiply by 4 by 3 to get 12:
12x + 3 * 6 -9x

Multiply 3 by 6 to get 18:
12x + 18 - 9x

Subtract 9x from 12x to get 3x:
3x + 18

Your answer is the second option!