Request Math problem

Discussion in 'General Chat' started by Mr Pancakes, Sep 6, 2016.

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  1. Mr Pancakes

    Mr Pancakes Well-Known Pancake

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    Can somebody solve this math problem step by step or explain me how to do it.

    In a room there were 2 times more men than women. After 6 men and 6 women left there were 5 times more men in the room. How many people were there in the begining?

    I need this as fast as possible.
    I know this isnt rly a hard problem but i just started school and still cant get my brain work properly.
     
  2. polokoi

    polokoi TVPropaganda

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    8 women 16 men

    Too lazy to explain, just write the answer
     
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  3. Mr Pancakes

    Mr Pancakes Well-Known Pancake

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    Ty but i cant only write thw answer i have to show the proces.
    Can you at least tell me how you started solving it and the method?
     
  4. nguuuquaaa

    nguuuquaaa 『Grade SSS Hentai Genius Supervert』

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    Number of women = x
    Number of men = y

    We have y = 2x and y - 6 = 5 * (x - 6)

    Well just substitute y = 2x into the 2nd equation and we have 2x - 6 = 5x - 30 or 3x = 24
    x = 8
    y = 16
     
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  5. Crimson Nanashi

    Crimson Nanashi Suu | Loves and protects Master

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    12 people Will explain later on how to get 12
     
  6. Lucinia

    Lucinia Baby turtles are the Overlords of cuteness *_*

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    Whoa cheating on a mathtest with the help of nuf nice

    [​IMG]
     
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  7. BlackBlade

    BlackBlade Well-Known Member

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    Let x be the number of women and let y be the number of men. Then try to take the sentences you wrote and turn them into equations involving x and y. Lastly either use replacement or elimination methods to figure out the value of one of the variables x or y. Once you find out one, finding the other is easy.
     
  8. kooly

    kooly Active Member

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    Start by writing down what you know.
    Let x = number of men in the room, y = number of women in the room.
    number of men (x) = 2 * number of women (y)... x = 2y
    Then from the original x and y, 6 from both leave..
    (x-6) = (y-6) * 5
    So you have two equations, use substitution.
    2y - 6 = (y - 6) * 5 = 5y - 30
    2y - 6 = 5y - 30
    -3y = -24
    y = 8 women
    You know there was twice as many men originally, so therefor 8 * 2 = 16.
     
  9. wraith

    wraith -----------------

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    3 men and 5 women

    y = 2x and y - 6 = 5 * (x - 6)

    Well just substitute y = 2x into the 2nd equation and we have 2x - 6 = 5x - 30 or 3x = 24
    x = 5
    y = 3
     
  10. Mr Pancakes

    Mr Pancakes Well-Known Pancake

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    Ty
    i realized that i should use this method but couldnt figure the second equation
     
  11. negritis

    negritis The Mathematician

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    doesn't it bother you, that with 5 and 3 the y = 2x fails? :D
     
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  12. karsarts

    karsarts wonder when can I get reincrnated as a loli

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    Did you think about what would happen if your teacher also uses nuf? Lolz
     
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  13. Hacalyhd

    Hacalyhd Well-Known Member

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    So you're saying that 3 men are equal to 10 women? :eek:
    (And that they reproduce fast enough to allow 6 men and 6 women to leave the room?) :cool:

    We're talking about math I believe, not feminism and biology?:D
     
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  14. Marvin

    Marvin The Man who realize love

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    Sorry even i cant even understand the answer above.... too stupid me
     
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  15. polokoi

    polokoi TVPropaganda

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    Since the number we take away isn't big, the number can only be small. Now try to start with 20 and 10 and take always 6 from each. If the answer isn't 1w is 5m then lower both number till you get the right answer.

    I can't really explain properly in English so I tried another way here.
     
  16. Luxadia

    Luxadia Well-Known Member

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    Never underestimate biology and US human , human are scary..
     
  17. wraith

    wraith -----------------

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    It doesn't as of right now. It might bother me when I'm sober.
    Math? What?
     
  18. EvilDevil

    EvilDevil Guardian Devil

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    *sigh*
    *Wipes sweat*
    *Looks at my the one I tried on my note*
    ...damn...stupid maths with stupid mistakes!!

    Good job future generation!!
     
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  19. Mr Pancakes

    Mr Pancakes Well-Known Pancake

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    Thanks for all the answers and help
     
  20. negritis

    negritis The Mathematician

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    and here i can say that
    | C | + | C | = 0
    but
    | C - C | = 2 :D
     
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