Mesh Analysis

[sea.flea]

Hello everybody on the physics forum, i was just looking for someone to point me in the right direction and tell me if my equations are right
1. The problem statement, all variables and given/known data
Determine the current though the resistance R2 by mesh analysis
http://www.freeimagehosting.net/uploads/a77e95d378.jpg (http://www.freeimagehosting.net/)

3. The attempt at a solution
Ok, this is what i have so far:
Loop 1: I1=1A
Loop 2: R3(I2-I3)+R4(I2-I1)=12
Loop 3: -R1(I3-I1)+R3(I3-I2)-R2I3=0
1. The problem statement, all variables and given/known data



2. Relevant equations



3. The attempt at a solution

[Defennder]

Yeah it looks ok to me. Just solve for I2 and I3.

[CEL]

Hello everybody on the physics forum, i was just looking for someone to point me in the right direction and tell me if my equations are right
1. The problem statement, all variables and given/known data
Determine the current though the resistance R2 by mesh analysis
http://www.freeimagehosting.net/uploads/a77e95d378.jpg (http://www.freeimagehosting.net/)

3. The attempt at a solution
Ok, this is what i have so far:
Loop 1: I1=1A
Loop 2: R3(I2-I3)+R4(I2-I1)=12
Loop 3: -R1(I3-I1)+R3(I3-I2)-R2I3=0
1. The problem statement, all variables and given/known data



2. Relevant equations



3. The attempt at a solution

In loop 3 all signs should be the same (positive or negative)