Researchers identified college students who generally were procrastinators or non-procrastinators. the students were asked to report how many symptoms of physical illness they had experienced throughout the semester. by the end of the semester, most students had had some symptoms of physical illness regardless of their planning skills. the number of symptoms, y, reported for non-procrastinators was summarized in the function, equals.2x plus 6.5, where x stands for the number of passed weeks of the semester. similarly, equals.9xplus3 for procrastinators. find the week in the semester where both groups of students reported the same number of symptoms.