#### Answer

$x=5$

#### Work Step by Step

A rational expression is undefined when the value of its denominator is zero. Write and solve an expression where the denominator is zero.
$6x-30=0$
Add 30 to both sides.
$6x-30+30=0+30$
Simplify.
$6x=30$
Divide both sides by 6.
$6x\div6=0\div6$
Simplify.
$x=5$