Can someone please help me with those three questions with step by step work? They’re really hard to solve for me and I really need help.

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?

The price of an item has been reduced by 30%. the original price was $30. what is the price of the item now ?

How many solutions does the nonlinear system of equations graphed bellow have?