I did this about 2 years ago. Yes it is a specific technique. There is a specific "recipe" for how to do it. As I recall you identify every circuit "loop" keeping in mind that some components are shared by more than one loop. You write an equation for each loop, keeping track of all your polarities which can be tricky. The you end up with simultaneous equations. I solved those with matrix algebra but you might get away with substitution. (yeah my teacher made us do the matrix by hand). But I double-checked with my TI-83. What book are you using?

__________________
1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra