Mr. Niles has a box of accessories for clarinets. He has a total of 42 objects. He has 12 mouthpieces. He has four times as many reeds as neck straps. How many of each object does he have?

Solution:

                    12 + x + 4x = 42

                  x = 30/6 = 5 = straps

                 4x = 20 = neck pieces