Calculating Resistor Voltage: Understanding V1 and V2 Across a Resistor

[rajohns08]

1. If I know the voltages on both immediate sides of a resistor...lets say v1 is on voltage on left side of resistor, and v2 is voltage on the right side of the resistor, is the votage of the resistor = v2 - v1 if the positive side of resistor is to the right? Or can you not even calclulate the voltage of a resistor just based on the two voltages on either side of it.



2. Voltage drop equals voltage on resistor? i know v = i*r but i don't know value of i.



3. i have calculated v1 and v2 i just need to know if vx is equal to v2-v1

 

[rl.bhat]

i have calculated v1 and v2 i just need to know if vx is equal to v2-v1
Please show your calculations and post the text of the problem.