Question 994226
<pre>
{{{5x/(10x-20) - 10/(10x-20)}}}

Since both the denominators are the same,
we can combine the numerators over the common 
denominator:

{{{(5x-10)/(10x-20)}}}

Factor 5 out of the numerator and 
factor 10 out of the denominator:

{{{(5(x-2))/(10(x-2))}}}

Cancel the (x-2)'s:

{{{(5(cross(x-2)))/(10(cross(x-2)))}}}

{{{5/10}}}

Reduce the fraction:

{{{1/2}}}</pre>