Question 388139
[A]={{{(matrix(3,3,1,-1,9,2,-4,-1,3,6,-3))}}}
[x]={{{(matrix(3,1,x,y,z))}}}
[b]={{{(matrix(3,1,-27,-1,27))}}}
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[A][x]=[b]
[x]=[A]inv[b]
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Using matrix inversion,
[x]={{{(matrix(3,1,2,2,-3))}}}