\(\dfrac{-2}{7}< \dfrac{x}{3}< \dfrac{11}{4}\)
\(\Leftrightarrow\dfrac{-2.12}{7.12}< \dfrac{x.28}{3.28}< \dfrac{11.21}{4.21}\)
\(\Leftrightarrow\dfrac{-24}{84}< \dfrac{x.28}{84}< \dfrac{231}{84}\)
\(\Leftrightarrow-24< 28x< 231\)
\(\Leftrightarrow\dfrac{-24}{28}< x< \dfrac{231}{28}\)
\(\Leftrightarrow-0,86< x< 8,25\)
vì \(x\in Z\) nên \(x=\left\{0;1;2;3;4;5;6;7;8\right\}\)