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I'm practicing applying Thévenin's Theorem, and I'm struggling with computing \$R_{th}\$ in the following circuit:

enter image description here

My attempt: after removing voltage and current sources, and combining resistors in series, I get:

schematic

simulate this circuit – Schematic created using CircuitLab

  • I can disregard \$R_6\$, right?

  • Can I treat \$R_1+R_2\$ and \$R_4\$ as resistors in series? The fact that node \$A\$ lies between them makes me unsure.

  • Regardless of the answer to the previous questions, could I get a hint as to how to continue?

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    \$\begingroup\$ What happened to R3? \$\endgroup\$
    – Andy aka
    Commented Jan 25 at 21:35
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    \$\begingroup\$ You can disregard R7+ R8 because they are shorted. \$\endgroup\$
    – G36
    Commented Jan 25 at 21:37
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    \$\begingroup\$ @Andyaka OP wants to finds the current and the voltage across R3 using Thevenins Theorem. \$\endgroup\$
    – G36
    Commented Jan 25 at 21:39
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    \$\begingroup\$ @G36 how are you able to say that. I see nothing in the post that says that. So, what happened to R3? \$\endgroup\$
    – Andy aka
    Commented Jan 25 at 22:03
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    \$\begingroup\$ @G36 Sorry, I should have stated it, but it is true. \$\endgroup\$
    – Sam
    Commented Jan 25 at 22:04

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