How to Handle Opposing Current Sources in Mesh Current Method?

[AchillesWrathfulLove]

When using the Mesh Current Method and you encounter a loop with a current source that is going opposite to the mesh current do you write it down as a negative current source?

 

[berkeman]

Sounds right to me. You're asking about the KCL technique, right?

 

[AchillesWrathfulLove]

Actually I mean the Mesh Current Method which is a modified KVL (Kirchhoff Voltage Law).