Answer:
[tex]\frac{9}{x-3}[/tex]
Convert the problem into split up expressions.
[tex]\frac{18}{2}(x - 6)[/tex]
Take both 6 and 18's most common factor here, 2, and divide by 2 to simplify.
[tex]\frac{18}{2} = 9\\\\\frac{6}{2} = 3[/tex]
Cancel.
18 becomes 9
6 becomes 3
The equation turns into:
[tex]\frac{9}{x - 3}[/tex]
note that because we, "canceled" 2, that also means it does not appear in the simplified form since it was a factor.