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Re: [MathWithoutBorders] Algebra I - Do we need to finish entire text?

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  • Mary Rainey
    This is a simple answer I m sure but can anyone tell me why: 4.5x - 7.1x + 11.6 = 11.6 - 2.6x and NOT -2.6x + 11.6 thank you. Mary
    Message 1 of 6 , Nov 30, 2012
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      This is a simple answer I'm sure but can anyone tell me why:
       
      4.5x - 7.1x + 11.6 = 11.6 - 2.6x and NOT  -2.6x + 11.6
       
       
      thank you.
       
      Mary
    • David Chandler
      The two answers are equivalent. You can move the terms around on one side of an equation as long as you move the sign with the number (or expression) it is
      Message 2 of 6 , Nov 30, 2012
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        The two answers are equivalent.  You can move the terms around on one side of an equation as long as you move the sign with the number (or expression) it is part of.  This is the commutative property of addition.
        --David Chandler

        On Fri, Nov 30, 2012 at 2:55 PM, Mary Rainey <jimaryrainey@...> wrote:
         

        This is a simple answer I'm sure but can anyone tell me why:
         
        4.5x - 7.1x + 11.6 = 11.6 - 2.6x and NOT  -2.6x + 11.6
         
         
        thank you.
         
        Mary


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