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Math Help - Rewriting Expression

  1. #1
    Member classicstrings's Avatar
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    Rewriting Expression

    How do i rewrite, y = 30x/ (120-x) into y = (3600/(120-x)) - 30?
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  2. #2
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by classicstrings View Post
    How do i rewrite, y = 30x/ (120-x) into y = (3600/(120-x)) - 30?
    y = 30x/(120 6)

    = (3600 3600 + 30x)/(120 x)

    = 3600/(120 x) + (30x 3600)/(120 x)

    = 3600/(120 x) + [30(x 120)]/(120 x)

    = 3600/(120 x) 30(120 x)/(120 x)

    = 3600/(120 x) - 30
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  3. #3
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    Quote Originally Posted by classicstrings View Post
    How do i rewrite, y = 30x/ (120-x) into y = (3600/(120-x)) - 30?
    Hi,

    use long division:
    Code:
                                         3600
      30x           (-x+120) = -30 + ----------
    -(30x-3600)                        -x + 120
    -------------
           3600
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  4. #4
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by earboth View Post
    Hi,

    use long division:
    Code:
                                         3600
      30x           (-x+120) = -30 + ----------
    -(30x-3600)                        -x + 120
    -------------
           3600
    nice!
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  5. #5
    Member classicstrings's Avatar
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    Thank you both!
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