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Math Help - system of equation help please

  1. #1
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    system of equation help please

    how do I solve this:

    my set up:
    10x + 4y + 20z =2.5
    7.5x + 6y + 15z = 3
    15x + 3y + 40z = 1.75
    how to solve this system
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  2. #2
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    Quote Originally Posted by soccergad View Post
    how do I solve this:

    my set up:
    10x + 4y + 20z =2.5
    7.5x + 6y + 15z = 3
    15x + 3y + 40z = 1.75
    how to solve this system
    There are LOTS of ways.

    System of linear equations - Wikipedia, the free encyclopedia
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  3. #3
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    Quote Originally Posted by soccergad View Post
    how do I solve this:

    my set up:
    10x + 4y + 20z =2.5
    7.5x + 6y + 15z = 3
    15x + 3y + 40z = 1.75
    Might it be useful first to confirm that this system is appropriate to the word problem which generated it...?
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  4. #4
    Member rtblue's Avatar
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    ah... this problem makes my insides hurt... lol. Well, first isolate x. then plug what you got for x back into another equation. Solve for anther variable. Do this until you solve for all 3.
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