Pre-algebra

-5(c+15)<75

asked by Ashley
  1. Expand and transpose:
    -5(c+15)<75
    -5c - 75 < 75
    add 5c to both sides:
    -5c+5c -75 < 75 + 5c
    -75 < 75 + 5c
    subtract 75 from both sides
    -75-75 < 75-75 + 5c
    -150 < 5c
    Switch sides:
    5c > -150
    Divide by 5 on both sides:
    5c/5 > -150/5
    c > -30

    posted by MathMate

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