The result of $2 + 7 - 9$ is:

$2 + 7 = 9$ $9 - 9 = 0$

Thus, the answer is $0$.

Would you like further details or explanations?

Here are 5 related questions for practice:

1. What is $5 + 8 - 6$?
2. Solve $12 - 7 + 3$.
3. Calculate $15 + 4 - 10$.
4. What is the result of $9 + 6 - 15$?
5. Solve $20 - 8 + 2$.

Tip: Always follow the order of operations (left to right for addition and subtraction when no parentheses are involved).