The Attempt at a Solution
I assumed there to be two supernodes. The first one was between V1 and V2. The second supernode was between V2 and V3.
This is what i tried and i am not getting the right answers. Please can someone help me out! Apologies for the turned pictures. The actual answers are V1 =7.608v , V2 =-17.39v , V3 = 1.6305v