The equation you've provided is:

$z = y + x$

This is a simple linear equation where $z$ is expressed as the sum of $y$ and $x$.

Do you want to solve for any variable in particular (e.g., solve for $x$ or $y$)? Or perhaps you'd like to work with this equation in a specific context (like graphing or substitution)?

If you have more details or need further clarification, feel free to ask!

Here are 5 related questions:

1. How would you solve for $x$ in terms of $z$ and $y$?
2. What would the graph of this equation look like in three-dimensional space?
3. How can we apply this equation to a real-world problem (e.g., economics, physics)?
4. What happens to the equation if $y = 0$?
5. Can this equation be extended to more variables, like $z = y + x + w$?

Tip: For solving equations like this, isolating the variable of interest (like $x$, $y$, or $z$) is a helpful first step!