1. The problem statement, all variables and given/known data Calculate i2, given that r1=12, r2=6, r3=12, r4=6. There is a 20V source. The first step here is calculate Req, I believe. http://media.newschoolers.com/uploads/cache/images/1222468444-632813-600x325-1222468266Untitled2423423.jpg [Broken] 2. Relevant equations Req=(r1 ll r2) + (r3 ll r4) note: ' ll ' means parallel. 3. The attempt at a solution 1/Req = 1/(6+12)+1/(6+12) Req=9 The answer says that Req should be 8. Is my formula for Req correct?