Question 386520
[A]={{{(matrix(3,3,1,2,-1,2,3,4,3,-2,0))}}}
[x]={{{(matrix(3,1,x,y,z))}}}
[b]={{{(matrix(3,1,-7,1,9))}}}
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[x]=[A]inv[b]
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[x]={{{(matrix(3,1,1,-3,2))}}}