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Math Help - Simplifying some semi-complex exponent and fractions.

  1. #1
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    Simplifying some semi-complex exponent and fractions.

    Been taking a discrete math course and run into a few algebraic equations that need simplifying and haven't delt with this stuff in a long time so thought I would ask for help. If you don't mind breaking it down and showing me how to do it or giving me a link with similar problems that have been simplified I would GREATLY appreciate it. You just telling me unfortunately wont help me any on a test so would like to learn it. By the way, we are solving for Y on all of them I just couldn't put them on the same line without it messing up the formatting.

    Firstly I would like a answer check on this: Y =
    3(x-1)+1
    ---------
    2-(x-1)

    which simplified should be: Y =
    3x-2
    -----
    x+3

    the above should be a negative fraction I just used the negative sign to make the bar so it doesn't show.

    Here are a few others I am having trouble with:

    #1 Y =

    3x+1
    ------ - 1
    2 - x

    #2

    Y = 2(5x-x2)


    #3

    Y = 5(2x) (2x)2

    Thanks in advance, I really would appreciate the help.
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  2. #2
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    Quote Originally Posted by fretwise View Post
    Been taking a discrete math course and run into a few algebraic equations that need simplifying and haven't delt with this stuff in a long time so thought I would ask for help. If you don't mind breaking it down and showing me how to do it or giving me a link with similar problems that have been simplified I would GREATLY appreciate it. You just telling me unfortunately wont help me any on a test so would like to learn it. By the way, we are solving for Y on all of them I just couldn't put them on the same line without it messing up the formatting.

    Firstly I would like a answer check on this: Y =
    3(x-1)+1
    ---------
    2-(x-1)

    which simplified should be: Y =
    3x-2
    -----
    x+3

    Mr F says: The numerator should be 3 - x.

    [snip]
    ..

    Quote Originally Posted by fretwise View Post
    [snip]
    Here are a few others I am having trouble with:

    #1 Y =

    3x+1
    ------ - 1
    2 - x

    [snip]
    Start by writing 1 as (2 - x)/(2 - x) (why?)
    Last edited by mr fantastic; September 27th 2010 at 04:23 PM. Reason: Merged posts.
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