good afternoon. hope that you are having a wonderful day. i have a few questions for you if you have the time to answer them. As I hope that you do. First by reflecting on your professional or personal life what is an example of a situation that you might be able to use an equation with a single unknown to help understand? Also what is an example of a situation that you might not be able to use an equation with a single unknown to understand? What makes an equation with a single unknown helpful in one of your examples but not the other? Lastly, what patterns exist in the two examples that might be helpful in determining when to use a single equation? Well, thank you for answering and hope to get a response soon. Have a good night.