In the circuit below, VS = 65 V, R1 = 64 Ω, R2 = 190 Ω, R3 = 90 Ω, R4 = 290 Ω.
(a) The equivalent resistance (Req) at the dashed line
The Attempt at a Solution
I found the equivalent resistance of the circuit (139.612 [itex]\Omega[/itex]) by collapsing the circuit step-by-step, but that didn't seem to work. Apparently this line is referring to something else, and I'm not sure what to do.