-8x > -64

A little confused on how this is done.

  1. 0
  2. 2
asked by Kathrin
  1. -8x > -64

    Divide both sides by -8. Turn the sign around because you're dividing by a negative number.

    x < 8

    posted by Ms. Sue
  2. one way is to remember to change direction when multiplying/dividing by negative values. So,

    -8x > -64
    x < 8

    This is just a shortcut to doing the addition/subtraction to swap sides:

    -8x > -64
    add 8x:
    0 > 8x-64
    add 64:
    64 > 8x
    8 > x

    no change of direction needed here, but the 8x still winds up on the proper side of the arrow

    posted by Steve
  3. Thank you so much!

    posted by Kathrin
  4. You're very welcome.

    posted by Ms. Sue

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