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make " y " the subject?

x = 2+ 3y / y - 5 . thanks in anticipation .each step .

6 Answers

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  • Anonymous
    8 years ago
    Favorite Answer

    x = 2 + 3y / y - 5

    xy - 5x = 2 + 3y

    xy - 3y = 2 + 5x

    y ( x - 3 ) = 2 + 5x

    y = 2 + 5x / x - 3

    Source(s): me
  • 8 years ago

    x = 2+ 3y / y - 5

    1.Add 5 to both sides (they remain equal): x + 5 = 2 + 3y / y

    2.Take 2 from both sides: x + 5 - 2 = 3y / y

    3.Times both sides by y: (x + 5 - 2) * y = 3y

    4. Divide both sidesby 3: ((x + 5 - 2) * y) / 3 = y

    :)

    (Edited, sorry I made a mistake the first time)

    Source(s): A in GCSE Mathematics
  • Aleko
    Lv 6
    8 years ago

    Bring the RHS under a common denominator

    x=(2(y-5)+3y)/(y-5)

    cross-multiply

    x(y-5)=2y-10+3y

    bring the 5y from the RHS to the LHS and take y as a common factor

    y(x-5)=5(x-2) y=5(x-2)/(x-5)

  • Martin
    Lv 5
    8 years ago

    Multiply both sides of the equation by (y-5) ...

    x(y-5) = 2+3y

    Multiply out the brackets ...

    xy - 5x = 2 + 3y

    Subtract 3y from both sides ...

    xy - 3y - 5x = 2

    Add 5x to both sides ...

    xy - 3y = 5x + 2

    Factorise the left hand side to isolate y ...

    y(x-3) = 5x+2

    Divide both sides by (x-3) ...

    y = (5x+2) / (x-3)

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  • Como
    Lv 7
    8 years ago

    To be strictly correct brackets must be used.

    x = (2 + 3y) / (y - 5)

    xy - 5x = 2 + 3y

    (x - 3)y = 2 + 5x

    y = (2 + 5x) / (x - 3)

  • Anonymous
    8 years ago

    Not sure if you wanted this solved, so I'll just make y on the left side...

    y-5 = 7 + 3y / x

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