Results 1 to 3 of 3
Like Tree1Thanks
  • 1 Post By Debsta

Thread: Find the Numbers

  1. #1
    Super Member harpazo's Avatar
    Joined
    Sep 2014
    From
    NYC
    Posts
    995
    Thanks
    42

    Find the Numbers

    Two numbers add up to 72. One number is twice the other. Find the numbers.

    Let me see...

    Let x = one number
    Let 2x = the other number

    x + 2x = 72

    3x = 72

    x = 72/3

    x = 24

    Of course, 2x becomes 2(24) or 48.

    The numbers are 24 and 48.

    Check:

    Let x = 24

    x + 2x = 72

    24 + 2(24) = 72

    24 + 48 = 72

    72 = 72

    Looks ok to me. What do you say?
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    Joined
    Oct 2009
    From
    Brisbane
    Posts
    1,223
    Thanks
    449

    Re: Find the Numbers

    Good. Don't use your equation to check your answer though (in case your equation is incorrect). Check it back in the question itself.
    Do they add to 72? Yes. Is one twice the other? Yes. Done!!
    Thanks from harpazo
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Super Member harpazo's Avatar
    Joined
    Sep 2014
    From
    NYC
    Posts
    995
    Thanks
    42

    Re: Find the Numbers

    Quote Originally Posted by Debsta View Post
    Good. Don't use your equation to check your answer though (in case your equation is incorrect). Check it back in the question itself.
    Do they add to 72? Yes. Is one twice the other? Yes. Done!!
    You are right. If the two numbers add up to 72, then 24 + 48 should be 72, and they are for this problem.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Find the Numbers
    Posted in the Algebra Forum
    Replies: 7
    Last Post: Aug 27th 2014, 02:08 AM
  2. Find Numbers
    Posted in the Advanced Algebra Forum
    Replies: 0
    Last Post: Sep 1st 2012, 08:49 PM
  3. Replies: 3
    Last Post: Sep 23rd 2009, 12:04 PM
  4. Replies: 2
    Last Post: Apr 30th 2009, 06:28 AM
  5. Find Two Numbers
    Posted in the Algebra Forum
    Replies: 2
    Last Post: Dec 7th 2008, 08:59 AM

/mathhelpforum @mathhelpforum