I am learning about step response in RC and RL circuits and one of the problems i managed to redraw as the image above; however, when I am solving for i the answer is -5mA. I am just confused on why it is negative as soon in the image, I understand that I just use ohms law here to attain i. In other words how do I add the two voltage sources? I keep getting confused because natural i would have put 120-5 which yields a positive. Can anyone explain why it is 5-120?