Melanie saves $20 every month in her savings account. She withdrew $60 one time to go shopping. She now has $280 in her account. Which equation represents this situation?
 20m/60 = 280
 20m/60 = 280
 20m + 60 = 280
 20m + 60 = 280
 20m - 60 = 280
 20m - 60 = 280
 20m (60) - 280