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Math Help - 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 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) 8 form a+8 and also from 12, and the two results will be equal:

    <br />
(a+8)-8=12-8<br />

    which gives:

    a=4.


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

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

    (t-3)+3=8+3

    which gives:

    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:
    a + 8 = 12

    a + 8 - 8 = 12 - 8

    a = 4

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

    t+(-3)=8

    t - 3 = 8

    t - 3 + 3 = 8 + 3

    t = 11

    -Dan
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