I am self-studying circuit analysis, and got the following question incorrect.
I thought the answer was (a) since I know current is equal to voltage divided by resistance. I summed the resistors giving me $10$ ohms, and summed the voltages giving me $8$ volts. $8/10 = 0.8$ volts, and the current seems to be going from negative to positive, which is why I made it negative, hence $-0.8$ amps. The correct answer is $-0.2$ amps. Could someone explain why? I believe my summing of voltages was incorrect.