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Math Help - trying to understand why the answer is 6

  1. #1
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    trying to understand why the answer is 6

    I am trying to understand a math problem. I realize it is pretty basic; but, here it is: x - (-6) = 12

    According to the book I am reading the answer is:

    x - (-6) = 12
    x - (-6) + (-6) = 12 -6
    x = 6

    I, however, came up with a different answer and I can't figure out why I am wrong. I am hoping someone here can help me. My answer is:

    x - (-6) = 12
    x - (-6) + (+6) = 12 + 6
    x = 18
    Any help would be appreciated
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  2. #2
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    Quote Originally Posted by seven View Post
    I am trying to understand a math problem. I realize it is pretty basic; but, here it is: x - (-6) = 12

    According to the book I am reading the answer is:

    x - (-6) = 12
    x - (-6) + (-6) = 12 -6
    x = 6

    I, however, came up with a different answer and I can't figure out why I am wrong. I am hoping someone here can help me. My answer is:

    x - (-6) = 12
    remember negative*negative=positive
    so, x + 6 = 12
    x + 6 - 6 = 12- 6
    x=6

    Any help would be appreciated
    .
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  3. #3
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    thanks for the reply; but there is no multiplication, just subtraction in the problem
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  4. #4
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    think of it this way.

    x - (-6) = 12 if we let -6=a we have
    x - a = 12 now what do we have to do to get x by itself? add a to both sides.
    so we have x - a + a = 12 + a
    x= 12 + a
    x = 12 + (-6)
    x=6
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  5. #5
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    thanks...that, actually makes some sense to me
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