1. The problem statement, all variables and given/known data 2. Relevant equations 3. The attempt at a solution Using KCL at the top node of the branch whose voltage I'm supposed to find, I get this equation 5 - 1- i2 + 6 = 0 i2 is the current in third branch from left, whose direction has been chosen arbitrarily by me. Solving this gives me i2 = 10. And hence voltage through the third branch from left is 10*10. i.e 100. Since the branch in which voltage is asked is parallel to the branch of whose voltage I just found, they both have the same voltage, and thus, the answer to the question is 100. But that's not the answer they gave. Where am I going wrong?