Is this 1 or 9?

the answer is 1

Remeber PEMDAS.

You would do division and multiplication first.

9 - (3 / (1/3)) + 1

9 - (3*3) + 1

9 - 9 +1

Then we would subtract from left to right.

0 + 1

= 1 

The answer to this would be 1.