Aˉ+Bˉ+Cˉ=0\bar{A}+\bar{B}+\bar{C}=0Aˉ+Bˉ+Cˉ=0
Aˉ−Bˉ−Cˉ=0\bar{A}-\bar{B}-\bar{C}=0Aˉ−Bˉ−Cˉ=0
Aˉ=B+C\bar{A}=B+CAˉ=B+C
Aˉ+Bˉ=Cˉ\bar{A}+\bar{B}=\bar{C}Aˉ+Bˉ=Cˉ
