Question 26543
Try this:

{{{((9m)/(3m-1))+((3)/(1-3m))}}} Rewrite the second term.
{{{((9m)/(3m-1))-((3)/(3m-1))}}} Perform the indicated subtraction.
{{{(9m-3)/(3m-1)}}} Factor out a 3 in the numerator.
{{{3(3m-1)/((3m-1))}}} Cancel the common factor (3m-1).
The answer is 3