I am asked to solve for vX, PDEV BY iS1, P ABS BY vS3 (please see attached figure). We have only covered KCL, KVL, Ohm's law and Power in class. No Thevinen theorem, so it can't be used to help solve.
The Attempt at a Solution
I know that current will not pass through the 4 Ohm resistor or vS4. My initial hunch was to solve for iQ in terms of vS1 (upper left of figure) and then use that equation to help solve for a KVL with the 3 and 7 ohm resistors and vS3. The result was not pretty and very wrong.