
Algebra PreAlgebra and Basic Algebra Math Forum 
 LinkBack  Thread Tools  Display Modes 
October 21st, 2012, 12:32 PM  #1 
Newbie Joined: Oct 2012 Posts: 2 Thanks: 0  System of equations?
I hope this is the correct place to post this. I have 4 equations with 4 unknowns. Let's assume the lower case letters represent different numbers that are known constants. A = B/s B = C/t C = D/u A + B + C + D = 10 Can anyone give me some hints on how to solve this? Thanks! 
October 21st, 2012, 12:57 PM  #2  
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 13,638 Thanks: 954  Re: System of equations? Quote:
just get any 4 numbers that equal 10: as example, 1,2,3,4: A=1, B=2, C=3, D=4. A = B/s : s = B/A = 2/1 = 2 B = C/t : t = C/B = 3/2 C = D/u : u = D/C = 4/3  
October 21st, 2012, 01:44 PM  #3  
Global Moderator Joined: May 2007 Posts: 6,642 Thanks: 627  Re: System of equations? Quote:
B=C/t=D/(ut) A=B/s=D/(stu) D[1 + 1/u + 1/(ut) + 1/(stu)] = 10 I assume you can go from here.  
October 22nd, 2012, 01:16 AM  #4  
Newbie Joined: Oct 2012 Posts: 2 Thanks: 0  Re: System of equations? Quote:
 
October 22nd, 2012, 05:31 AM  #5 
Global Moderator Joined: Dec 2006 Posts: 19,992 Thanks: 1855 
Any way that you've been taught (or can find) to solve simultaneous linear equations would have worked.


Tags 
equations, system 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
equations system  alenov  Algebra  4  May 17th, 2013 06:09 AM 
System of equations ?  rs_lyly2009  Algebra  6  May 4th, 2013 05:23 PM 
The system of equations (64 equations 12 unknown) solution  ZeusTheMunja  Linear Algebra  20  January 25th, 2013 06:52 AM 
System of equations  zana93  Algebra  1  July 12th, 2012 11:02 AM 
System of Equations  aviation officer  Algebra  4  March 8th, 2011 11:08 AM 