1. The problem statement, all variables and given/known data [URL]http://img25.imageshack.us/i/circuitj.jpg[/URL] (Image won't show up, here's the link http://img25.imageshack.us/i/circuitj.jpg/) 2. Relevant equations Kirchoff's Junction & Potential rules. 3. The attempt at a solution [URL]http://img29.imageshack.us/i/circuit2.jpg[/URL] (Image won't show up, here's the link http://img29.imageshack.us/i/circuit2.jpg/) Equations I get are: (Loop1) [tex]-7I_2+4I_3 = 5[/tex] (Loop2) [tex]-4I_2 - 2I_2 +2I_3 - 2I_4 = 8[/tex] (Loop3) [tex]-6I_2 + 7.5I_3 - 2I_4 = 8[/tex] (Loop4) [tex]-3I_2 - 4I_1 - 1.5I_3 = 5[/tex] I made a matrix out of these then and row reduce them but, I don't have enough equations becuase I get a row of zeroes... which doesn't make sense to me, 4 equations, 4 unknowns and I don't see why applying Kirchoffs rules would make me end up with something like that... so I need to get another equation, but I was wondering if I've done wrong with the equations.