[tex]\displaystyle \\
4x \ \textless \ \ \textgreater \ 36 \\ \\
\text{Aceasta inecuatie este echivalenta cu inecuatia:} \\ \\
4x \neq 36 \\ \\
x\ \textless \ \ \textgreater \ \frac{36}{4} ~~~\Longleftrightarrow~~~ x \neq \frac{36}{4} \\ \\
x\ \textless \ \ \textgreater \ 9~~~\Longleftrightarrow~~~x \neq 9 \\ \\
\Longrightarrow~~~\boxed{x \in (-\infty,~9)\bigcup (9,~\infty) }\\ \\
\texttt{sau} \\ \\
\Longrightarrow~~~\boxed{x \in R - 9}[/tex]