Respuesta :
-20
You do the reverse operation on the 4. The opposite of +4 is -4. You subtract -4 on both sides so your left with m on one side and -20 on the other side. -16 - 4 = -20
You do the reverse operation on the 4. The opposite of +4 is -4. You subtract -4 on both sides so your left with m on one side and -20 on the other side. -16 - 4 = -20