\[\left\{ \begin{matrix}
\frac{14}{4x + 1} > \frac{11}{4x + 1}\text{\ \ \ \ \ } \\
12x + 1 < 3x + 11 \\
\end{matrix} \right.\ \text{\ \ \ \ \ \ \ \ }\]
\[\left\{ \begin{matrix}
\frac{3}{4x + 1} > 0\ \ \\
9x - 10 < 0 \\
\end{matrix}\ \right.\ \text{\ \ \ \ \ \ }\]
\[\left\{ \begin{matrix}
4x + 1 > 0 \\
x < 1\frac{1}{9}\text{\ \ \ \ \ \ \ } \\
\end{matrix} \right.\ \text{\ \ \ \ \ }\]
\[\left\{ \begin{matrix}
x > - 0,25 \\
x < 1\frac{1}{9}\text{\ \ \ \ \ \ } \\
\end{matrix} \right.\ \]

\[Ответ:\left( - 0,25;\ 1\frac{1}{9} \right).\]