The given equation is:

$5x + y = 9$

To solve or analyze this equation, we can explore different scenarios:

1. Solve for $y$ in terms of $x$: $y = 9 - 5x$

2. Solve for $x$ in terms of $y$: $x = \frac{9 - y}{5}$

3. Find specific solutions: By substituting values of $x$ or $y$, we can find corresponding values of the other variable.
   For example:

   • If $x = 1$, then $y = 9 - 5(1) = 4$.
   • If $y = 0$, then $x = \frac{9 - 0}{5} = 1.8$.

4. Graphing: This equation represents a straight line in a two-dimensional coordinate system with:

   • Slope $m = -5$
   • Y-intercept at $(0, 9)$.

Would you like to graph this equation or solve for specific values?