Hello everyone,
Im having difficulty finding the norton equivalent current source: Below is the circuit, my attempt and the solution manual. In particular for mesh I2 my equation is not the same as the solution manual. with 20(I2) instead of 30(I2). Can someone please review my equation for mesh I2 and tell me if my answer is correct?
Thank you for your help, its greatly appreciated.

Solutions Manual:

 

I'm with you. The derivation of mesh 2 equation is incorrect. Which makes the solution also incorrect. Well spotted by you.

 

thank you sir