The wording translated to Math is THIS:
5 <= x-8 <= 14.
"No more than 14" is the same as "less or equal to 14".
"No less than 5" is the same as "greater or equal to 5".
Actually, after reading your post, I don't know what EXACTLY you want and what help do you need.
One possible task is to translate the words to Math.
The other possible task is to solve inequality.
So please, in the future, write exactly in the post WHAT YOU WANT TO GET from the tutors.
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Formally, since your post came without a question, it can be REJECTED and IGNORED, according to the rules of this forum.
Besides of it, submitting a post without a question is demonstration of disrespect to tutors (who spend their time for you).