Solve the equation .`z/(z + 15) = 4/9`

Explanation

To solve the equation \( \frac{z}{z + 15} = \frac{4}{9} \), we will follow these steps:

### Step 1: Eliminate the denominator
To eliminate the denominator, we will multiply both sides of the equation by \( 9(z + 15) \).

\[ 9(z + 15) \cdot \frac{z}{z + 15} = 9(z + 15) \cdot \frac{4}{9} \]
...