i do understand virtual ground, this is my second circuits course.. regarding the cricuit, i'm sorry i guess i used the wrong word.. i meant to say i'd like to see how the first circuit was re-drawn/transformed to your circuit.And you said, There is no simplification. The redrawn circuit is identical to the original circuit.
caramel,so lets see, for Vo = 20/27 V:
eq1: Vo = Vp + 4Vs/9
eq2: Vp = 2Vs/3 ==> 0Vo + Vp = 2Vs/3 ==> 0Vo = -Vp + 2Vs/3
eq2/eq1 ==> Vs = 2/3 Volts
and Vo = 10Vs/9 = (10/9)(2/3) = 20/27 Volts
caramel,wow! lol.. we haven't had Millman's Thm yet, but i see you got the same answer i did, so i guess all is good....... she used to always specify if she wanted us to solve using variables only, don't know why she didn't here!
anyway, thanks so much.. i really appreciate your efforts, hgmjr.. and thanks to everyone else who helped, especially Ron H for providing the easier-to-work-with circuit.. you guys/ladies are life-savers
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by Jake Hertz
by Ikimi .O