Select all of the situations that can be represented by the equation 4x + 10 = 20 a. Joan had ten more than four times as many marbles as Sammy. Joan had twenty marbles altogether. b Sammy had ten marbles. Jadyn and Sammy had 20 marbles together. Jadyn had four times as many marbles as Sue. How many marbles did Sue have? c Jadyn had 4 marbles, Sammy had 10 and together they had 20 marbles. d Sammy and Jadyn had twenty marbles altogether. Ryan had x marbles.