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Math Help - Homework solve this for me

  1. #1
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    Homework solve this for me

    Hi from quebec city, first post and i speak french so i'm not good with english math expresisons...anyway
    ok i managed to get an equation, but i can't simplify it.
    can you solve this please.

    x*((165/(x/65000))+.05) - x = 0

    Thanks alot
    Last edited by pettygaw; November 10th 2008 at 09:45 PM.
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  2. #2
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    Hi

    Quote Originally Posted by pettygaw View Post
    Hi from quebec city, first post and i speak french so i'm not good with english math expresisons...anyway
    ok i managed to get an equation, but i can't simplify it.
    can you solve this please.

    x*((165/(x/65000))+.05) - x =

    Thanks alot
    = (165x /(x /65000)) + 0.05x - x

    = 165 / (1/65000) + 0.05x - x

    = 165*65000 -0.95x = 0

     x = \frac{165*65000}{0.95}
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  3. #3
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    rapha i hope you are still there, i made a mistake, my equation is

    x*((165/(x/65000))+.05) = y
    i need to find that y but i don't know how because it's in relation with my x. related to this equation, the final equation i need to solve is this:

    20 475 000 + x((165/(x/65000))+.05) = x

    i hope you understand me
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  4. #4
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    Quote Originally Posted by pettygaw View Post
    rapha i hope you are still there, i made a mistake, my equation is

    x*((165/(x/65000))+.05) = y
    i need to find that y but i don't know how because it's in relation with my x. related to this equation, the final equation i need to solve is this:

    20 475 000 + x((165/(x/65000))+.05) = x

    i hope you understand me
    No, i do not, sorry
    x*((165/(x/65000))+.05) = y
    i need to find that y
    What do you mean?
    x*((165/(x/65000))+.05) = 0.05*x + [165x /( x /(65000)) ]

    = 0.05x + [165 / (1/65000)]

    = 0.05x + 165*65000 = y

    its a linear function

    20 475 000 + x((165/(x/65000))+.05) = x
    why is a x on the right side? Should it be y?

    I dont know
    Anyway, you know x((165/(x/65000))+.05) = 0.05x + 165*65000

    => 20 475 000 + 0.05x + 165*65000 = x

    => 20 475 000 + 0.05x-x + 165*65000 = 0

    ...

    => x = ???
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