Ask Experts Questions for FREE Help !
Ask
    Isuckatmath16's Avatar
    Isuckatmath16 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Sep 16, 2009, 01:47 PM
    solving systems of equations in 3 variables
    OK I am really confused on how to do this...
    I understand how but the numbers are not adding up
    here is the problem

    2x-y+4z=11
    x+2y-6z=-11
    3x-2y-10z=11
    morgaine300's Avatar
    morgaine300 Posts: 6,561, Reputation: 276
    Uber Member
    		  
    #2

    Sep 16, 2009, 09:58 PM

    If the numbers are not adding up, could you please show us what you did so that someone can check your work and see where you are doing wrong?
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
    Uber Member
    		  
    #3

    Sep 17, 2009, 08:00 AM

    Well, I can say that they 'add up'. Try to make all the variables in an equation the same. I mean, substitute for example x and y by their corresponding values of z. Therefore, find x in terms of z, find y in terms of z, then substitute x and y in one of the equations to solve for z. Once you have z, you can find x and y from the 'x in terms of z' you just had before, and the same thing applies to y.
Not your question? Ask your question View similar questions
 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

Logarithms and solving for variables [ 1 Answers ]

I have 4 logarithmic problems that I need help with... log10 (10^1/2) log10 (1/10^x)

World problems involving systems of equations with three variables [ 1 Answers ]

I got this problem for school and I don't really know where to start... :-( Suppose you are setting up for a small business and have invested $5000 to produce an item that will sell for $9. If each uniet can be produced for $7, how many units must you sell to break even?

World problems involving systems of equations with three variables [ 1 Answers ]

so I got this problem for school and I'm working on it but I think I set it up wrong.. In Super Bowl I, on January 15, 1967, the Green Bay Packers defeated the Kansas City Chiefs by a score of 35 to 10. The total points scored came from 13 different scoring plays, which were a combination of...

Solving systems of equations in three variables? [ 1 Answers ]

a+b=3 -b+c=3 a+2c=10

Systems of equations with 3 variables [ 1 Answers ]

How do you solve systems of equations with 3 variables? And what if one of the equations only has 2 of the variables? Example: 1) 2x+3y-4z=20 2) 3x-2y+z=12 3) 5x-2z=4 Don't try to solve this one, I just made it up to give you an example.

View more questions Search