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## Homework Statement

Find the current through the 100 Ohm resistor:

http://imgur.com/sohdpyE

## The Attempt at a Solution

So I was able to simplify the 100 and 500 resistors, as well as the 20, 20 and 10 series resistors, but I can't seem to discern at all whether any of the remaining ones are in series or parallel. I used a circuit simulator online which seems to think that the current is 53.3mA, but of course I can't even get the equivalent resistance, much less find the current. I just don't know how at all to work with circuits that have nodes like these running through them. Help is appreciated. Thanks!