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    bekahboo's Avatar
    bekahboo Posts: 1, Reputation: 1
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    #1

    Feb 27, 2010, 02:32 PM
    solve a proof
    how do I solve this proof?:

    If a+b=c, then a=c-b
    ROLCAM's Avatar
    ROLCAM Posts: 1,420, Reputation: 23
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    #2

    Feb 28, 2010, 04:04 AM

    By shifting b from one side of the equation to the other side, it has to change the sign from+ to -.
    InfoJunkie4Life's Avatar
    InfoJunkie4Life Posts: 1,409, Reputation: 81
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    #3

    Mar 2, 2010, 09:09 AM

    If a + b = c then c - b = a




    Postulate: What you do to one side of an equation you must to to the other.
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