Respuesta :

Answer: C

Explanation:
2(Eq 1) = 2x + 2y + 2z = 2

Now add that to equation 1

x + y - 2z = -2
+2x + 2y + 2z = 2

Notice -2z from the first equation plus 2z from second equation equals 0.
Use Photomath math it’s really good download it
ACCESS MORE