BACKGROUND: WHEN DISCUSSING KCL WE SAW
THAT NOT ALL POSSIBLE KCL EQUATIONS
ARE INDEPENDENT. WE SHALL SEE THAT THE
SAME SITUATION ARISES WHEN USING KVL
THE THIRD EQUATION IS THE SUM OF THE
OTHER TWO!!
A SNEAK PREVIEW ON THE NUMBER OF
LINEARLY INDEPENDENT EQUATIONS
EXAMPLE: FOR THE CIRCUIT SHOWN WE HAVE 
N = 6, B = 7.
HENCE THERE ARE ONLY TWO INDEPENDENT
KVL EQUATIONS