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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 1800-270 ≤35a+26（50-a） ≤1800-300 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        1800 - 270 ≤35 * a + 26 * ( 50 - a )         (1)
        35 * a + 26 * ( 50 - a ) ≤1800 - 300         (2)

---

    From inequality(1)：
         a ≥ 230/9
    From inequality(2)：
         a ≤ 200/9

---

    From inequalities (1) and (2)
        x ∈ Φ (Φ is empty)that is, the inequality will never be estatlished within the real number range!    (3)

---

    The final solution set is :
        x ∈ Φ (Φ is empty)that is, the inequality will never be estatlished within the real number range!

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