Respuesta :

-np - 70 < 40 -np < 40 + 70 -np < 110 -np/-p < 110/-p n < 110/-p 4w - 7k = 28 4w-4w-7k = 28 - 4w -7k = 28 - 4w -7k/-7 = 28-4w /-7 k = 28-4w/-7