Results 1 to 4 of 4

Math Help - [SOLVED] Solving System of Equations

  1. #1
    Junior Member
    Joined
    Nov 2008
    Posts
    53

    Smile [SOLVED] Solving System of Equations

    Question #1:
    Solve the following system of equations using the elimination method.

    3x - 9y =10 (1)
    4x + y = 7 (2)

    ...
    Question #2:
    Solve the following system of equations.
    x + 3t =1
    4x + 15t = 2

    Any help or comments towards solving these would be greatly appreciated.
    Thanks!
    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 cnmath16 View Post
    Question #1:
    Solve the following system of equations using the elimination method.

    3x - 9y =10 (1)
    4x + y = 7 (2)

    Mr F says: Multiply equation (2) by 9 and add the result to equation (1).

    ...
    Question #2:
    Solve the following system of equations.
    x + 3t =1
    4x + 15t = 2

    Mr F says: Multiply equation (1) by -4 and add the result to equation (2).

    Any help or comments towards solving these would be greatly appreciated.
    Thanks!
    ..
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Junior Member
    Joined
    Nov 2008
    Posts
    53
    For Equation #1,
    I came up with this answer..

    (2) x 9 36x = 63 (3)

    (3) + (1)

    39x/39 = 73/39

    x= 1.87? Does this make sense? Or did I miss a step?
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Flow Master
    mr fantastic's Avatar
    Joined
    Dec 2007
    From
    Zeitgeist
    Posts
    16,948
    Thanks
    5
    Quote Originally Posted by cnmath16 View Post
    For Equation #1,
    I came up with this answer..

    (2) x 9 36x = 63 (3)

    (3) + (1)

    39x/39 = 73/39

    x= 1.87? Does this make sense? Or did I miss a step?
    You should stay with the exact answer of x = 73/39. Now you have to get the value of y.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Solving a system of 4 equations
    Posted in the Algebra Forum
    Replies: 2
    Last Post: March 7th 2012, 07:31 AM
  2. Help with solving system of equations
    Posted in the Algebra Forum
    Replies: 2
    Last Post: January 13th 2012, 06:35 PM
  3. Help on Solving with System Equations
    Posted in the Algebra Forum
    Replies: 3
    Last Post: November 13th 2011, 07:16 PM
  4. Need help solving this system of equations
    Posted in the Algebra Forum
    Replies: 4
    Last Post: April 6th 2010, 04:49 PM
  5. Solving a system of equations
    Posted in the Advanced Algebra Forum
    Replies: 1
    Last Post: May 24th 2008, 12:32 AM

Search Tags


/mathhelpforum @mathhelpforum