\left( \begin{array} { r r r } { 0 } & { 1 } & { 2 } \\ { 1 } & { 0 } & { - 1 } \\ { 3 } & { - 1 } & { 1 } \end{array} \right) ^ { - 1 } \left( \begin{array} { r } { - d } \\ { - d } \\ { - d } \end{array} \right) = \left( \begin{array} { l } { a } \\ { b } \\ { c } \end{array} \right)
Solve for d, a, b, c
d=6c
a=-5c
b=-8c
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