Respuesta :

(2x + 4y - 3z) + (3y + 2z + 6x) + (4z - 8x - 7y)

= 2x + 4y - 3z + 3y + 2z + 6x + 4z - 8x - 7y

= (2x + 6x - 8x) + (4y + 3y - 7y) + (-3z + 2z + 4z)

= 0 + 0 + 3z

= 3z