Respuesta :

48x-28y

Step-by-step explanation:

(8x+4x=12x) - 7y

4 x 12x = 48x

4 x -7y = -28y

Answer:

48x - 28y

Step-by-step explanation:

8x + 4x = 12x

(12x)4 = 48x

(7y)4 = 28y