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Math Help - find variable in this equation

  1. #1
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    find variable in this equation

    the questions without numbers kill me

    here's my work, I have no answer to know if I'm right

    bx = c-x

    bx = c-x
    x x

    x= b +1/ c

    if anyone can help, I'd appreciate it
    Thanx
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  2. #2
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    Re: find variable in this equation

    Quote Originally Posted by whereitsbeen View Post
    the questions without numbers kill me

    here's my work, I have no answer to know if I'm right

    bx = c-x

    bx = c-x
    x x

    x= b +1/ c

    if anyone can help, I'd appreciate it
    Thanx
    I assume you're solving for x (provide directions, please)

    bx = c-x

    bx + x = c

    x(b+1) = c

    x = \frac{c}{b+1}
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  3. #3
    MHF Contributor

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    Re: find variable in this equation

    Quote Originally Posted by whereitsbeen View Post
    the questions without numbers kill me

    here's my work, I have no answer to know if I'm right

    bx = c-x

    bx = c-x
    x x
    The inter net does not respect spaces. You mean (bx)/x= (c- x)/x
    That is b= (c/x)- 1
    c/x= b+ 1

    x= b +1/ c
    Two errors- strictly speaking this means x= b+ (1/c) and what I think you meant was x= (b+ 1)/c- which is still wrong. if you divide both sides of c/x= b+ 1 by c you still have the x in the denomator on the left. you should have 1/x= (b+1)/c.

    Now, you can invert both sides to get x= c/(b+ 1).

    If anyone can help, I'd appreciate it.
    Thanx
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