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Thread: Need help with 10th grade math problem.

  1. #1
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    Need help with 10th grade math problem.

    There are 6 barrels of root beer in the store.
    In the picture below it is shown how much liters of root beer is in each barrel.
    2 customers come to the store and one of them bought 2 full barrels, while the other one bought 3.
    It is also known that the second customer bought twice as much root beer than the first one.
    There was only 1 barrel left, which one?

    Need a solution to this.

    Need help with 10th grade math problem.-screenshot_1.png
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  2. #2
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    Re: Need help with 10th grade math problem.

    $2(a_1+a_2)=(b_1+b_2+b_3)$

    it's easy enough to code up a little routine to solve this

    Customer 1 buys (15,18) for a total of 33 liters.

    Customer 2 buys (16,19,31) for a total of 66 liters

    The 20 liter keg is left over.
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  3. #3
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    Re: Need help with 10th grade math problem.

    Here is the same question with the complete solution:

    Need help with 10th grade math problem. - General Discussion - backpack.tf forums
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