The equation you've written, $-7 - 6 = 9$, is not correct.

Here’s why: $-7 - 6 = -13$ Subtracting 6 from -7 results in -13, not 9.

Let me know if you need further clarification, or if you'd like to solve a related problem!

Here are some similar questions to consider:

1. What is $-7 + 6$?
2. How do you calculate $-9 - 4$?
3. Can you solve $10 - (-3)$?
4. What is the result of $-5 - (-5)$?
5. How does adding a negative number differ from subtracting?

Tip: Remember, subtracting a positive number makes the result more negative.