**1. The problem statement, all variables and given/known data**

If R

_{1}is 3Ω, R

_{2}is 6Ω and R

_{3}is 9Ω, what are the three currents in figure 16-4, in which the batteries are 6.0v and 12.0v?

**2. Relevant equations**

I_{1}+I_{2}+I_{3}

**3. The attempt at a solution**

I’ve got three equations so far

I worked out

+6-3I_{1}-9I_{2}=0

and

+12-6+6I_{2}-9I=0

For the next step I have to find I_{1} in terms of I_{2} but I’m not sure how I do that

**1. The problem statement, all variables and given/known data**

**2. Relevant equations**

**3. The attempt at a solution**

http://ift.tt/1kklPHs