1. The problem statement, all variables and given/known data Hey guys, Can someone please explain how the following circuits that I attached are equivalent? I'm not seeing that they are when I develop equations for the output Z. For the first one I get Z=Q1+Q2=(Q1'+Q2')+(XQ2')'=Q1'+Q2'+X'+Q2 For the second image I get Z=Q2'+Q1=(XQ2')'+Q1=X'+Q2+Q2+Q1' so I must be messing up somewhere and not catching it. Any suggestions? Thanks!