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    Gernald's Avatar
    Gernald Posts: 901, Reputation: 93
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    #1

    Aug 1, 2008, 10:36 AM
    combine an equation?
    This is stupid I know but how do I combine this?
    D - (d + c)

    I got -C but somehow I think I'm really wrong.

    Thanks
    Capuchin's Avatar
    Capuchin Posts: 5,255, Reputation: 656
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    #2

    Aug 1, 2008, 12:18 PM
    Looks right to me. Think of it this way:

    d - (d+c)

    = d + -1(d+c)

    = d + (-d - c)

    = d - d - c

    = -c
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #3

    Aug 2, 2008, 02:54 AM
    Yeah, me too, I think it's right. Could I know what made you feel that was wrong? Just want to know, perhaps.. too simple or weird?
    Gernald's Avatar
    Gernald Posts: 901, Reputation: 93
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    #4

    Aug 2, 2008, 03:04 PM
    I haven't taken math in ages and I was taking a placement test and I answered the questions but I kind of freak out afterwards and it wouldn't let me see which ones I got wrong so I was curious.
    And yes... it did seem too easy for that to be the answer. Somehow I was thinking that you distrubute the -c throughout the parenthesis... kind of dumb but like I said it's been a while... all summer in fact.
    Thanks though... your answers helped reassure me quite a bit.
    :)
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #5

    Aug 3, 2008, 08:29 PM
    Ok, problem solved then!:)
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