Answer
3
Work Step by Step
$\frac{2}{x^{3}}-\frac{6}{x^{4}}=o$
$x^{4}(\frac{2}{x^{3}}-\frac{6}{x^{4}})=0$
$x^{4}\frac{2}{x^{3}}-x^{4}\frac{6}{x^{4}}=0$
$2x-6=0$
$2x=6$
$x=3$
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