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  1. #1
    MagixAries's Avatar
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    Exclamation One SIMPLE math question. Needs IMMEDIATE help.

    Rules of Addition Problems Alge. --

    1) The volume of water in a tank during a five-day period changed as follows: up 325 L, down 270 L, down 164 L, up 83 L and down 157 L? What was the volume of water in the tank at the beginning of the five-day period if the final volume was 52 L?
    Show the equation!

    Please help me with these problems!! Show all your work if you would please!!! I need this answered ASAP! It's due tomorrow!!!
    Many thanks, Aires.

    Tagging some smart ppls for help... @Alen
    @unicorn69 @Jigsaw @Blitz @Ravallo
    Last edited by MagixAries; 10-05-2012 at 11:31 PM.
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  2. #2
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    Never been that great with Math myself, but shouldn't you atleast know the measurements of this tank??


     

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  3. #3
    Alen's Avatar
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    The thing you're looking for is the volume of the water in the tank at the beginning, so let's call it x. What you do know is the final volume and what was added or taken from the starting volume to get there, so, following the steps described in your task, the equation would look something like:

    x+325L-270L+83L-157L=52L

    Of course since you're looking for x, just throw all the non-x stuff on one side and x on the other, so to speak.

    x=52L-325L+270L-83L+157L
    x=71L

  4. The Following 2 Users Say Thank You to Alen For This Useful Post:

    MagixAries (10-06-2012),Viktor (10-12-2012)

  5. #4
    MagixAries's Avatar
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    Quote Originally Posted by Alen View Post
    The thing you're looking for is the volume of the water in the tank at the beginning, so let's call it x. What you do know is the final volume and what was added or taken from the starting volume to get there, so, following the steps described in your task, the equation would look something like:

    x+325L-270L+83L-157L=52L

    Of course since you're looking for x, just throw all the non-x stuff on one side and x on the other, so to speak.

    x=52L-325L+270L-83L+157L
    x=71L
    ohhhh, I see, is there a way to check if it's correct?
    Btw, thank you so much for your help Alen!!! You're AWESOME
    "You said 'I love you', and I said too.
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  6. #5
    Alen's Avatar
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    Quote Originally Posted by MagixAries View Post
    ohhhh, I see, is there a way to check if it's correct?
    Btw, thank you so much for your help Alen!!! You're AWESOME
    Use a calculator, google or wolfram alpha to check the calculation. I just quickly did it in my calc so I might have made a typo or something

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    MagixAries's Avatar
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    Quote Originally Posted by Alen View Post
    Use a calculator, google or wolfram alpha to check the calculation. I just quickly did it in my calc so I might have made a typo or something
    Uhm, I think you missed (-164) in the equation. SInce it also said "down 164 L" in the word problem. I got 235 as the answer, may you check if you have the same answer too?
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  8. #7
    Alen's Avatar
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    Yeah my bad, I must have missed it, my memory ain't all that great tbh / It's 235, yup.

  9. #8
    MagixAries's Avatar
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    Ok thanks, you may close this thread now, I'm all set!
    "You said 'I love you', and I said too.
    The only difference is, I didn't lie to you."

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