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Math Help - transposing formula

  1. #1
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    transposing formula

    anyone transpose a in this formula to make it the subject?

    A = h x (a + b)/2
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  2. #2
    Forum Admin topsquark's Avatar
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    Quote Originally Posted by spanki007 View Post
    anyone transpose a in this formula to make it the subject?

    A = h x (a + b)/2
    I assume the "x" is a multiplication symbol? If so, please don't use it. It looks too much like the variable x.

    A = h \cdot \frac{a + b}{2}

    2A = h(a + b)

    2A = ha + hb

    ha = 2A - hb

    a = \frac{2A - hb}{h}

    Then if you like
    a = \frac{2A}{h} - b

    -Dan
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  3. #3
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    Thanks Dan
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  4. #4
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    Quote Originally Posted by topsquark View Post
    I assume the "x" is a multiplication symbol? If so, please don't use it. It looks too much like the variable x.

    A = h \cdot \frac{a + b}{2}

    2A = h(a + b)

    2A = ha + hb

    ha = 2A - hb

    a = \frac{2A - hb}{h}

    Then if you like
    a = \frac{2A}{h} - b

    -Dan
    Your skill is awesome but us mortals recognize the X as multiplication and . as fraction :P. Seriously though i sometimes use brackets for multiplication as it's less ambiguous. e.g A = (h)(a + b)



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    Frank
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  5. #5
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    Equation of perpendicular bisector

    Edit: Oops, wrong topic.
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