Results 1 to 3 of 3

Math Help - Simultaneous equation 2 unknown vairables

  1. #1
    Newbie
    Joined
    May 2009
    Posts
    15

    Simultaneous equation 2 unknown vairables

    Hi i have the following problem..


    0.00243 = 200/E - V/E (100)

    0.00057 = 100/E - V/E(200)


    I have been asked calc E & V from the equations.. I've tried sbstitution to solve it but I cannot seem to isolate any 1 of the vairables

    Please help

    Bailey
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Junior Member
    Joined
    Nov 2008
    From
    Vermont, New England, USA, North America, Earth, Sol Solar System, Orion Arm, Milky Way Galaxy
    Posts
    61
    Quote Originally Posted by Bailey View Post
    Hi i have the following problem..


    0.00243 = 200/E - V/E (100)

    0.00057 = 100/E - V/E(200)


    I have been asked calc E & V from the equations.. I've tried sbstitution to solve it but I cannot seem to isolate any 1 of the vairables

    Please help

    Bailey
    the first the you want to do is simplify. we'll just work on the first equation. you have .00243=\frac{200}{E}-\frac{100V}{E}
    that can be simplified to .00243=\frac{200-100V}{E}
    multiply both sides by E and you should be able to figure it from there! post if you need more help
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Member
    Joined
    Mar 2008
    From
    ???
    Posts
    169
    Quote Originally Posted by Bailey View Post
    Hi i have the following problem..


    0.00243 = 200/E - V/E (100)

    0.00057 = 100/E - V/E(200)


    I have been asked calc E & V from the equations.. I've tried sbstitution to solve it but I cannot seem to isolate any 1 of the vairables

    Please help

    Bailey
    Substitution isn't the onl y way to solve simultaneous equations there is elimintaion for example :

    3x + 4y = 1
    6x - 2y = 5

    you can solve this by multiplying the 1st equation by 2 and then subtract the 1st equation with the 2nd


    6x + 8y = 2
    -( 6x - 2y = 5)
    0x + 10y = -3
    y = -3/10 ...
    try this method for you question...
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Solve For the Unknown (ln equation)
    Posted in the Pre-Calculus Forum
    Replies: 1
    Last Post: November 6th 2011, 06:02 PM
  2. 1 unknown equation solver
    Posted in the Math Software Forum
    Replies: 3
    Last Post: June 7th 2011, 12:42 PM
  3. Replies: 3
    Last Post: February 27th 2009, 07:05 PM
  4. An equation with unknown exponent
    Posted in the Algebra Forum
    Replies: 6
    Last Post: October 6th 2008, 07:12 PM
  5. Replies: 5
    Last Post: May 22nd 2008, 06:23 AM

Search Tags


/mathhelpforum @mathhelpforum