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Math Help - question about cramers rule

  1. #1
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    question about cramers rule

    If I was to solve these equations by using cramers rule would I lay it out like the below matrix?

    1/180V1 - 1/1800V2 = 0.005

    -1/1800V1 + 41/36000V2 - 1/2400V3 = 16/6000

    -1/2400V2 + 1/1500V3 = 6/12000

    \begin{bmatrix}1/180&-1/1800&0\\-1/1800&41/36000&-1/2400\\0&-1/2400&1/1500\end{bmatrix}.
    " alt="
    \begin{bmatrix}1/180&-1/1800&0\\-1/1800&41/36000&-1/2400\\0&-1/2400&1/1500\end{bmatrix}.
    " />
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  • #2
    MHF Contributor
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    Well, why would you not LCM them equations first:
    Code:
      10V1 -   V2        =  9
     -20V1 + 41V2 - 15V3 = 96
           -  5V2 +  8V3 =  6
    Justa suggestion...
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