Can someone answer #7 . you dont even need to solve i just need the equation!

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?

Factor and solve to find roots x squared -x - 90 =0

Hi i’m not sure how to do question 20 if u could explain how to do it that’d b great