To make this easier, we can present the equation like this:
93
- 58
-------
First we subtract 8 from 3 in the ones place. Since 8 is larger than 3 we need to borrow ten from 9 in the tens place. So 9 is now 8 and 3 is now 13.
What is 13 - 8? 5.
Next we subtract the numbers in the tens place. 8 - 5 is what? 3.
So our final answer is 35.
93
- 58
--------
35
I hope you find this helpful.