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Inequality with negative constants

  1. Sep 23, 2009 #1
    1. The problem statement, all variables and given/known data

    Solve each of the following inequalities; give your answers in interval notation.

    i) ax + b < c, where a, b, c are negative constants


    2. Relevant equations



    3. The attempt at a solution



    ax < c - b
    x > c - b / a
    because I'm dividing by a negative constant.

    x > -b + c / a
     
  2. jcsd
  3. Sep 23, 2009 #2

    lanedance

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    Homework Helper

    try rewriting the equation using
    A = -a
    B = -b
    C = -c

    then A,B,C are all positive & things shoud be a little clearer
     
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