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Easy one killing me

  1. Apr 12, 2005 #1
    3z/2=z/6+4

    so

    i x multiply and get
    18z=2z+8
    16z=8

    z=1/2

    this look right?

    thanks
     
  2. jcsd
  3. Apr 12, 2005 #2

    arildno

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    Unfortunately no; you forgot to multiply your constant with 6 as well
    (with the "constant", I mean the lone "4" in your original equation)
     
  4. Apr 12, 2005 #3
    hmm

    ok you lost me /shrug
     
  5. Apr 12, 2005 #4

    arildno

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    3z/2=z/6+4
    1. Multiply both sides of the equation with 6:
    6*(3z/2)=6*(z/6+4)
    OR:
    18z/2=6z/6+6*4
    Or:
    9z=z+24
    That is:
    8z=24
    Whereby:
    z=3

    Note:
    I didn't bother with your cross-multiplication; that was an unnecessary operation.
     
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