Graphing the related system means that you do not have to rewrite the equation to set it equal to 0. It is easier because you can just graph each side of the equation.
Sometimes it is difficult to locate the intersection point for the system. You might have to zoom in a lot or figure out how to resize the window. Using the related function lets you focus on the x-axis to find the points.
Bulimia Nervosa/ Binge-purging syndrome is usually characterized by binge eating followed by guilt people with this disorder typically consume about 1000-10,000 calories in one sitting. Hope this helps =)
