A bag contains white marbles and blue marbles, 57 in total. The number of white marbles is 9 more than 2 times the number of blue marbles. How many white marbles are there?
+934 Let's call the blue marbles x and white marbles 2x+9. That means that 3x+9= 57. solving for x, you get x= 16. This means that 16 marbles are blue which means 41 marbles are white.
