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Online ProgramSolve the system of equations with inverse matrices using technology.
\(\begin{array}{rcl} {5x+y-4z} & {=} & {-4} \\ {-3y-6z} & {=} & {-21} \\ {-x-x-z} & {=} & {-6} \end{array}\)
Enter your answer as an ordered triple \(\left(x,y,z\right).\)
Leave no space inbetween and separte the values with a comma.