Simplify 9/11z − 4/11z

To simplify the expression \( \frac{9}{11z} - \frac{4}{11z} \), you can combine the two fractions since they have the same denominator:

\[ \frac{9 - 4}{11z} = \frac{5}{11z} \]

So, the simplified expression is:

\[ \frac{5}{11z} \]