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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 7 ≤2X+9 <13 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        7 ≤2 * x + 9         (1)
        2 * x + 9 <13         (2)

---

    From inequality(1)：
         x ≥ -1
    From inequality(2)：
         x < 2

---

    From inequalities (1) and (2)
         -1 ≤ x < 2    (3)

---

    The final solution set is :
         -1 ≤ x < 2

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