Respuesta :

Answer: you can use 12 and 4 twice and yhe others once

Step-by-step explanation: 12-4-5-6-12-4

Answer:

  4 -12 -5 -6 = -19

Step-by-step explanation:

This is basically -12 -7, where -7 = -6 -1 and -1 = 4-5.