Need with finding the missing length

Brian, chris, and damien took a math test that had 20 questions. the number of questions brian got right is 14 more than the number of questions chris got right. damien correctly answered 2 less than the number of questions chris answered correctly. if brian and damien have the same score, which statement is true?

What is the binomial expansion of (2x-3)^5

How to write four times a number, minus 6,is equal to theee times the number+8 as an equqtion