Using mesh current analysis was a breeze, but I am also asked to use node voltage.
As far as your second suggestion, I combined those resistors in the equations above.
I am having a hard time trying to determine the voltage at VA and VB. I know that VC = VD = 10V. At first I thought this would be a simple setup, but I'm unsure about how to set up an equation for VA considering that there is a resistor and a voltage source between it and the reference node...