Results 1 to 4 of 4

Math Help - Re-arranging formula

  1. #1
    Newbie
    Joined
    Sep 2010
    Posts
    2

    Question Re-arranging formula

    I have the equation:

    e=(a*c*d)-(d*(b-a))

    and need to make d the subject?!

    Cheers,

    Sam
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor Unknown008's Avatar
    Joined
    May 2010
    From
    Mauritius
    Posts
    1,260
    1. Expand d(b-a) first.
    2. Expand -(d(b-a)) then.
    3. Factorise all the d's
    4. Divide by something to get d alone.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Member
    Joined
    Apr 2009
    Posts
    136
    Awards
    1
    expand first bracket

    e = acd - (d*(b-a))

    expand second bracket

    e = acd -db + da

    divide both sides by d

    e/d = ac - b + a

    flip both sides

    d/e = 1 / ac - b + a

    multiply both sides by e

    d = e / ac - b + a
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Newbie
    Joined
    Sep 2010
    Posts
    2
    Awesome, thanks Joel
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Re-arranging formula
    Posted in the Pre-Calculus Forum
    Replies: 8
    Last Post: January 13th 2011, 07:27 AM
  2. help re-arranging a complex formula
    Posted in the Calculus Forum
    Replies: 1
    Last Post: October 20th 2009, 09:07 PM
  3. Re-arranging formula question
    Posted in the Algebra Forum
    Replies: 4
    Last Post: September 18th 2008, 04:00 PM
  4. Re-arranging
    Posted in the Algebra Forum
    Replies: 2
    Last Post: June 14th 2008, 09:16 AM
  5. Re-Arranging
    Posted in the Algebra Forum
    Replies: 7
    Last Post: March 14th 2007, 08:39 AM

Search Tags


/mathhelpforum @mathhelpforum