*When you entered university you met Lee Know, the mathematics teacher, and you fell madly in love, however he always rejected every invitation you made to him; Some time later he noticed that you were no longer approaching him, which is why he was very worried and jealous when he saw that all your attention was going to Seungmin *

—9x-7i>3(3x-7u), solve this exercise, now

His gaze was very cold