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## Homework Statement

The problems tells me to determine the potential difference between between two points. I alrady know that the potential of one point is zero. The problem I am having is that the cirucit has two batteries. I do not have a question so i will describe it, it hsould be easy to visulaize. The first battery is 9V and current I1=3.0A and moves across a resistor R1=2.0 ohms. The second battery is 12.0V and current I2=2.0A and moves across a resitor R2=1.5 ohms. The current then combines at a junction where I1+I2=I3. My question is how to I find the at the junction. I3 flows out of the junction and is5.0A.

## Homework Equations

V=IR

series and parallel resistor equations

Kirchoff's rule

## The Attempt at a Solution

I caluclated the voltage drop at R1 to be 6.0V, therefore there is 3.0V heading to the junction from I1. I calcualted the voltage drop at R2 to be 3.0V, therefore there is 9.0V heading into the junction from I2. Are the voltages additive? Im not sure bc it would make sense?

are the voltages additive at the point.