Steve gets 4 points for every correct answer and looses 1 point for every wrong answer. If he answered 30 questions and scored 20 points, write a system of equations. Group of answer choices

{+r+++w+=+30++4r+−+1w+=20+

{+r+++w+=+30++4r+++1w+=+20+

{+r+++w+=+20++4r+++1w+=30+

{+r+++w+=+20++4r+−+1w+=+30+