\(\dfrac{8}{17}< \dfrac{x}{17}< \dfrac{15}{17}\Rightarrow8< x< 15\)
\(\dfrac{8}{17}+\dfrac{5}{17}< \dfrac{x}{17}>\dfrac{6}{17}+\dfrac{9}{17}\)sửa thành\(\dfrac{8}{17}+\dfrac{5}{17}< \dfrac{x}{17}< \dfrac{6}{17}+\dfrac{9}{17}\)
\(\Rightarrow\dfrac{13}{17}< \dfrac{x}{17}< \dfrac{15}{17}\)
\(\Rightarrow\dfrac{13}{17}< \dfrac{14}{17}< \dfrac{15}{17}\)
\(\Rightarrow x=14\)