To solve the equation $x - y = 10$ for $y$:

1. Start with the given equation: $x - y = 10$
2. Subtract $x$ from both sides to isolate $-y$: $-y = 10 - x$
3. Now, multiply both sides by $-1$ to solve for $y$: $y = x - 10$

So, the solution is: $y = x - 10$

Would you like more details or have any questions?

Here are 5 related questions to consider:

1. What happens if $x = 15$? What is the value of $y$?
2. How would you graph the equation $x - y = 10$?
3. What is the solution to $x - y = 0$?
4. If $x$ is negative, how does the value of $y$ change?
5. Can you express $x$ in terms of $y$?

Tip: When solving for a variable, always ensure that all terms involving the variable are isolated on one side of the equation.