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Math Help - help find the denominator

  1. #1
    Newbie
    Joined
    Nov 2009
    Posts
    6

    help find the denominator

    x-y+3z=1,<br />
2x+z=0,<br />
-x+y-3z=0

    Please let me know how to solve this question
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  2. #2
    Senior Member
    Joined
    Mar 2009
    Posts
    378
    I am not sure what the title of this thread has to do with the problem, but...
    To solve this you will want to solve for x in the first equation, then substitute that into the second equation. Now solve for y in the second equation, then substitute that and what you got for x into the third equation. At this point the third equation should be in terms of z only. Finally, sovle for z. This last step will give you a number. Now use this to determine y and finally use both y,z to determine x.
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