Example: Consider the following resistor network. There are five variablesv, v.v,i,i W SR We can write 4 linear equations R Ri.-R R2 RExample: Consider the following resistor network. There are five variables, , , , , . 1 2 3 1 2 V V V i i We can write 4 linear equations: 3 4 2 3 2 2 2 2 2 3 3 2 2 1 1 1 1 1 1 1 1 v R i v R v R i v R i R i v R v R i i       