#### Answer

$\frac{6x}{x-4}$

#### Work Step by Step

Factor each term then eliminate any factors that are common to numerators and denominators.
Multiply numerator by numerator and denominator by denominator.
$\frac{x}{5}\times\frac{30}{x-4}=\frac{x}{\big/\!\!\!5}\times\frac{\big/\!\!\!5\times6}{x-4}=\frac{6x}{x-4}$