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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality x/(220-x) >= 0.1 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         x / ( 220 - x ) >= 0.1         (1)
        From the definition field of divisor
         220 - x ≠ 0        (2 )

---

    From inequality(1)：
         x ≥ 20
    From inequality(2)：
         x < 220 或  x ＞ 220

---

    From inequalities (1) and (2)
         20 ≤ x < 220 或  x ＞ 220    (3)

---

    The final solution set is :
         20 ≤ x < 220 或  x ＞ 220

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