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Jim,

here is a brief of one way: 2.124/3=.708 amps X 4.2857 (parallel res. from formula)= 3.034V/15ohm =.202 amps X 3 = .6068 Vd

Another way is 2.124V/3=.708amps 6/21=.2857%X .708 = .2022amps (rem... Login to read more.