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Thread: Simplification with an Unknown

  1. May 4th 2011, 05:12 AM #1
    dumluck
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    Simplification with an Unknown

    Hi all,

    I'm trying to simplify t = [tex]\frac{(3b * 4)}{2b}[\MATH]

    In my head it simplifies to 3b*2, but the answer is 6?

    Thx,
    D
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  2. May 4th 2011, 05:18 AM #2
    Quacky
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    Use the [Tex] tags; Latex hasn't been working for a while.

    \frac{3b\times~4}{2b}

    Writing '4' as 2x2, we have:

    =\frac{3\times b\times 2\times 2}{2\times b}

    Just rearranged slightly for clarity:

    =\frac{2\times b\times 2 \times 3}{2 \times b}

    Just cancel like terms from here.

    =6

    Where did you go wrong, exactly?
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