Answer
$$4$$
Work Step by Step
\begin{aligned}
\lim _{x \rightarrow 0} \frac{8 x}{3 \sin x-x}&=\lim _{x \rightarrow 0} \frac{8}{3 \frac{\sin x}{x}-1}\\
&=\frac{8}{3(1)-1}\\
&=4
\end{aligned}
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