Respuesta :

Answer:

-17

Step-by-step explanation:

-3+n= -20

n= -20+3= -17

n=-17

Answer:

n = -17

Step-by-step explanation:

Plus 3 into both side, we got:

-3 + n = -20

-3 + 3 + n = -20 + 3

n = -17

Hope this helped :3