Theo bài ra ta có HPT : \(\left\{{}\begin{matrix}2Z_A+N_A+3\left(2Z_B+N_B\right)=196\\2Z_A+2Z_B-N_A-N_B=60\\Z_B+N_B-Z_A-N_A=8\\2Z_B+N_B-2Z_A-N_A=13\end{matrix}\right.\)
\(\Rightarrow\) \(\left\{{}\begin{matrix}Z_A\approx16\\N_A\approx6\\Z_B\approx21\\N_B\approx9\end{matrix}\right.\)
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