Respuesta :
Answer:
12x+9
Step-by-step explanation:
you have to add the like terms which are 4x and 8x which give you 12x. And so that get the answer 12x+9
Answer:
12x+9
Step-by-step explanation:
you have to add the like terms which are 4x and 8x which give you 12x. And so that get the answer 12x+9