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i dont understand why she subtract the number 3 to both sides of the equaton..?

gencent

by gencent at May 04, 2011

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to make each side of the equation equal as she simplifies it.  subtracting a three from only one side would make the sides uneven and invalidate the equation.

espoir espoir May 04, 2011

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to simplify it

RayneRayneGoAway RayneRayneGoAway May 04, 2011

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