The answer you are looking for is x+5.
In the case scenario, I am going to be using the "x" variable.
"x"=the current Oklahoma state record
For example, if the fastest Oklahoma state time is 54, we cannot use the equation "x-5," because then his time would be 49, which is faster, but if we use "x+5," then his time would be slightly slower at 59. This is just an example, by the way. This might not be the actual time. It may be a little bit confusing, because usually "+" means faster, and "-" means slower, but in swimming, you want to drop your time. So, this is why if he was slower, it would be "+," and if he was faster, it would be "-." I actually swim on a swimming team, so I am used to this kind of stuff. Anyways, this is just a brief explanation of why the algebraic expression is "x+5" and not "x-5."
Based on this example, we can finally conclude that the final answer for this algebraic equation would be "x+5," with x=the fastest Oklahoma time.
So, therefore, the final answer is "x+5."
Hope this helped answer your question for you. Good day to you.