Question 358865
[A]={{{(matrix(3,3,1,3,-1,-2,-6,1,3,5,-2))}}}
[x]={{{(matrix(3,1,x,y,z))}}}
[b]={{{(matrix(3,1,1,-3,4))}}}
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[A][x]=[b]
[x]=[A]inv[b]
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det[A]={{{-1/4}}}
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[A]inv={{{-(1/4)*(matrix(3,3,7,1,-3,-1,1,1,8,4,0))}}}
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[x]={{{(matrix(3,1,2,0,1))}}}