Do \(\left|10-x\right|,\left|8-x\right|\ge0\forall x\)
\(\Rightarrow\left\{{}\begin{matrix}10-x=0\\8-x=0\end{matrix}\right.\) \(\Leftrightarrow\left\{{}\begin{matrix}x=10\\x=8\end{matrix}\right.\)(Vô lý)
Vậy \(S=\varnothing\)
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