For success solving nodal analysis circuit problems, you can checkout the book I'm using for reference, Electricity Demystified - http://amzn.to/2ybreKU.

Nodal Analysis is just another approach for thinking about an electrical circuit. In this approach, you look at the voltages at each node with respect to a reference node (usually ground, i.e. zero volts). So, when solving unknowns using Nodal Analysis you would take the following steps:

1. Label the node voltages (i.e., the voltages at each node with respect to to your reference (usually ground).
2. Then, use KCL to find relationships between currents.
3. Use Ohm's Law to write relationships between our known values to simplify (and then solve) for our unknowns.

*You also may be interested in the following other videos*
+KCL:    • KCL (Kirchhoff's Current Law) Practic...  
+KVL:    • KVL (Kirchhoff's Voltage Law) Circuit...  

My goal is to help my students succeed in all aspects of their lives. Here are some recommended tools to help you find success.

*Success in Electronics or Engineering*
+ Introduction to Basic Electronics - http://52364cdc4do5cn2nazwmvgj9a7.hop...
+ Basic Circuit Analysis - http://amzn.to/2xxdPuL

*Success in School*
+ How to Win at College - http://amzn.to/2yeQjGq
+ Get Better Grades by Studying Smarter! - http://874bf9z88-y64q27254i133i6q.hop...
+ How to be a Straight A Student - http://amzn.to/2zd7vui

*Success In Life*
+ Goal Tracking System (web-based) - http://d6a218199dz69xd106ogz9s470.hop...
+ Innovation & Creative Thinker (skill employers love) - http://amzn.to/2zdQUq3
+ Developing a Mindset for a Fulfilled Life - http://amzn.to/2xwVzqd

The videos I post on YouTube are primarily for my own college students, so I usually do not have time to respond to YouTube comments. Sorry. But, if you have questions, you can checkout free EE Lessons.Courses and contact me through there: http://www.EEReviewVideos.com