Câu trả lời:
Câu1:
Có \(\left\{{}\begin{matrix}2Z-N=22\\2Z=1,733N\end{matrix}\right.\)
'<=> 0,733N=22
<=> N = 30
=> Z=26
=> 2Z+N=82
Câu 2:
Có \(\left\{{}\begin{matrix}2Z+N=86\\2Z=1,6875N\end{matrix}\right.\)
=>N=32
Câu3:
Có \(\left\{{}\begin{matrix}2Z-N=16\\2N=2Z\end{matrix}\right.\)
=> N=Z=16
=> 2Z+N= 48
Câu 4:
Có \(\left\{{}\begin{matrix}N=\dfrac{2Z}{2}\\2Z+N=48\end{matrix}\right.\)
=> Z=N= 16
=>A=Z+N=16+16=32
Câu5:
Có \(\left\{{}\begin{matrix}2Z=\dfrac{15N}{8}\\Z+N-Z=16\end{matrix}\right.\)
=> N=16
=> Z= 15
=>A = N+Z=15+16=31
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