Cost of one ticket is c dollars.
Cost of two tickets is 2c dollars.
Amount paid is $20.
Amount of change received is dollars.
Amount of change received is dollars. \ \
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=c6e96a422ddb5d891efbc54fb79c81d6.png\")
dollars.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=c6e96a422ddb5d891efbc54fb79c81d6.png\")
dollars. \ \