I am asked to find the equivalent Thevenin circuit between nodes A and B of the following problem. I have attached my work because I have no idea if this is completely correct or totally wrong. Can someone please take a look at it? I would really appreciate it.

Also, if they had asked me to calculate the Thevenin circuit between the nodes that limit R6, could this have been a good starting point, or would it be incorrect?

I am not sure if I am removing the resistances properly in both cases.

Thank you for any help!

I am asked to find the equivalent Thevenin circuit between nodes A and B of the following problem, removing R1. I have attached my work because I have no idea if this is completely correct or totally wrong. Can someone please take a look at it? I would really appreciate it.

Also, if they had asked me to calculate the Thevenin circuit between the nodes that limit R6, could this have been a good starting point, or would it be incorrect?

I am not sure if I am removing the resistances properly in both cases.

Thank you for any help!