V=IR (Voltage = Current x Resistance)
Possibly Kirchoff's Loop Rule but I'm not really sure how to use it
The Attempt at a Solution
I looked at something else on line and ended up doing 9 - 0.7(3) - 6 - 2(3) which got me the right answer for the first part but I don't really what I did and if that is the proper way to solve the problem so any explanation/correction for that would be great. For the second part, I had no idea.