Engineering Calculating Voltage in a Circuit

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To calculate the voltage at the node labeled "+", one can treat the circuit as a voltage divider, excluding the 4k and 12k resistors. The voltage at the node labeled "-" should be calculated similarly. The final step involves taking the difference between the voltages at the two nodes to find the desired voltage. This method effectively simplifies the problem and allows for straightforward calculations. Understanding voltage dividers is crucial for solving such circuit problems.
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Imagine that the 4k and 12k were gone; could you calculate the voltage at the node labeled "+"? It's just a voltage divider. Then do the same thing at the node labeled "-" and take the difference of the voltages at the two nodes.
 

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