mathematics

This is a discussion on mathematics within the C++ Programming forums, part of the General Programming Boards category; suppose i have a variable b = t*4+s if i happen to know b, is it possible to get t ...

  1. #1
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    mathematics

    suppose i have a variable b = t*4+s

    if i happen to know b, is it possible to get t and s, using div and mod? how?

    t=?
    s=?

  2. #2
    Confused Magos's Avatar
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    solution

    b = (t * 4) + s

    t = (b - s) / 4

    s = b - (t * 4)
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  3. #3
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    I got this:

    s = b/(t*4)
    t = (b-s)/4

    substitute t in the first equation:
    s = b/((b-s)/4)*4) = b/(b-s)

    manipulate equation and get:
    s^2 - sb + b = 0

    or do it for the t equation and get:
    4t^2 - bt + 4b = 0

    now solve for s or t, then substitute it back into the equation.

    I think I did it right???
    There's probably a better way though.

  4. #4
    Registered User jasrajva's Avatar
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    obviously
    b = t*4+s
    cannot have unique soln for any given b

    so given b you can assume values for t
    say from 1 to 100 and then find the corresponding value of s or vice versa


    ie 10 = 1*4 +6
    also = 2*4 +2
    = 3*4 +(-2)

    and so on

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