\(a,\\ \left\{{}\begin{matrix}P+E+N=93\\P=E\\N-P=6\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}2P+N=93\\N-P=6\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}P=E=Z=29\\N=35\end{matrix}\right.\\ b,A=Z+N=29+35=64\left(đ.v.C\right)\\ Tên.ngto:Đồng\)