Find Current Through R2: 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

Homework Statement

Determine the current though the resistance R2 by mesh analysis
http://www.freeimagehosting.net/uploads/a77e95d378.jpg

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

 

[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

Homework Statement

Determine the current though the resistance R2 by mesh analysis
http://www.freeimagehosting.net/uploads/a77e95d378.jpg

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

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