Results 1 to 3 of 3

Math Help - Help Solving

  1. #1
    Junior Member
    Joined
    Sep 2010
    Posts
    68

    Help Solving

    Started studying Algebra recently and need help in solving the following:

    Make c the subject of the equation:

    ab - ac = bc

    So far i've got:

    ac + bc = ab

    Then i try isolate c on the left:

    \frac {a+b}{c} = ?

    Is that in the right direction? Any tips would be greatly appreciated!
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Flow Master
    mr fantastic's Avatar
    Joined
    Dec 2007
    From
    Zeitgeist
    Posts
    16,948
    Thanks
    5
    Quote Originally Posted by BIOS View Post
    Started studying Algebra recently and need help in solving the following:

    Make c the subject of the equation:

    ab - ac = bc

    So far i've got:

    ac + bc = ab

    [snip]
    => c(a + b) = ab

    => c = ....
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Junior Member
    Joined
    Sep 2010
    Posts
    68
    c = \frac {ab}{a+b}

    I don't know how i missed that! Argh. Thanks so much for the reply. Exactly the same type of equation i had problems with yesterday. Extracting the subject when it was multiplied by another variable. Thanks again!
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. I need help solving for x
    Posted in the Pre-Calculus Forum
    Replies: 9
    Last Post: July 8th 2010, 02:14 PM
  2. solving for x.
    Posted in the Algebra Forum
    Replies: 11
    Last Post: September 11th 2009, 07:20 PM
  3. Help with solving a log
    Posted in the Algebra Forum
    Replies: 1
    Last Post: June 30th 2008, 01:32 PM
  4. solving cos.
    Posted in the Trigonometry Forum
    Replies: 1
    Last Post: November 25th 2007, 09:17 AM
  5. Replies: 3
    Last Post: October 11th 2006, 09:15 PM

Search Tags


/mathhelpforum @mathhelpforum