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Thread: equation

  1. #1
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    equation

    a+8=12

    t+(-3)=8
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by dianna View Post
    a+8=12
    You have $\displaystyle a+8=12$.

    If two things are equal if you take the same thing from both the two results
    are still equal.

    So here we take (subtract) $\displaystyle 8$ form $\displaystyle a+8$ and also from $\displaystyle 12$, and the two results will be equal:

    $\displaystyle
    (a+8)-8=12-8
    $

    which gives:

    $\displaystyle a=4$.


    t+(-3)=8
    This is the same thing as: $\displaystyle t-3=8$

    Here we do the same sort of thing, we add $\displaystyle 3$ to $\displaystyle t-3$ and $\displaystyle 8$ to get:

    $\displaystyle (t-3)+3=8+3$

    which gives:

    $\displaystyle t=11$

    RonL
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  3. #3
    Forum Admin topsquark's Avatar
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    Quote Originally Posted by dianna View Post
    a+8=12

    t+(-3)=8
    Whatever you do to one side of the equation, you must do to the other:
    $\displaystyle a + 8 = 12$

    $\displaystyle a + 8 - 8 = 12 - 8$

    $\displaystyle a = 4$

    =================================

    $\displaystyle t+(-3)=8$

    $\displaystyle t - 3 = 8$

    $\displaystyle t - 3 + 3 = 8 + 3$

    $\displaystyle t = 11$

    -Dan
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