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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality （1800+3180）-【200b+170（30-b）】大于或等于1240 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( 1800 + 3180 ) - ( 200 * b + 170 * ( 30 - b ) ) ≥1240         (1)

---

    From inequality(1)：
         b ≤ -136/3

---

    The final solution set is :
         b ≤ -136/3

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