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Math Help - Various Signed Numbers

  1. #1
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    Various Signed Numbers

    I forgot how to do this. Please solve and explain.









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  2. #2
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    Quote Originally Posted by radioflyer01 View Post
    I forgot how to do this. Please solve and explain.









    (2 + 3 + 5)/(-2) = 10/(-2) = -5

    4 - (-6) + [-(3 + 1) -2] = 4 + 6 - 4 - 2 = 4

    u + (-21) = 18 --> u - 21 = 18

    u - 21 + 21 = 18 + 21

    u = 39
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  3. #3
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    Thanks. But I'm not sure how the first and the third problem was solved. How exactly was it done?
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  4. #4
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    Was it devide the sum of 2,3,5 =10 by -2?
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  5. #5
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    yes in the first problem its divide so  \frac{10}{-2} = \frac{5}{-1} = {-5}


    in the 3rd problem

     u + (-21) = 18

    this becomes  u -21  = 18 as + - becomes -

    then move the -21 to the otherside of the equation

     u = 18 + 21
     u = 39
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  6. #6
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    if thats not clear still, tell me and ill do a long step by step explanation
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  7. #7
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    No sweat. I got it.
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