Hello board, I ran into a relatively (well I thought) simple problem, but I think I'm going brain dead.
**broken link removed**
The above circuit has a 100 ohm, and a 70 ohm(68 was closest) resistor in series with a resistor(Rx) in parallel across points A and B. There must be 3V at points A and B.
Rx is not in parallel.
Rx is in series with the 100 ohm and the 68 ohm. You are correct that setting the value of Rx at 30 ohms will result in 3 volts across Rx.