Overview: 1 questions will be solved this time.Among them
           ☆1 inequalities

[ 1/1Inequality]
    Assignment:Find the solution set of inequality (10-x)(9-x) <6 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( 10 - x ) * ( 9 - x ) <6         (1)

---

    From inequality(1)：
         7 < x < 12

---

    The final solution set is :
         7 < x < 12

Your problem has not been solved here? Please take a look at the  hot problems ！