Solve Circuit Homework: Calculate v1, v2 & v3

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Homework Statement



can anyone tell me the way to caculate the v1, v2 and v3 shown in the picture?thankyou ><

Homework Equations



v1, v2 and v3.

The Attempt at a Solution

 
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I would use the Kirchoff Current Law (KCL -- the sum of all currents out of a particular node is equal to zero). Write the KCL equations for all of the nodes in the circuit, and then solve those simultaneous equations for the unknown voltages.