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Math Help - Systems in 3 Variables

  1. #1
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    Systems in 3 Variables

    Have to find x,y,and z.

    1.)
    x - y - 5z = -2
    y + 3z = 9
    x + y + z = 16

    HELP ASAP please& thank you
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  2. #2
    Master Of Puppets
    pickslides's Avatar
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    Solve this

    \left[ \begin{array}{c}<br />
x\\<br />
y\\<br />
z\end{array}\right]=\left[ \begin{array}{ccc}<br />
1 & -1 & -5 \\<br />
0 & 1 & 3 \\<br />
1 & 1 & 1 \end{array} \right]^{-1} \left[ \begin{array}{c}<br />
-2\\<br />
9\\<br />
16\end{array}\right]
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