Question 330424
[A]={{{(matrix(3,3,2,-1,1,1,1,-1,1,3,-2))}}}
[b]={{{(matrix(3,1,7,4,-11))}}}
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det[A]={{{3}}}
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[A]inv={{{-(1/3)*(matrix(3,3,1,1,0,1,-5,3,2,-7,3))}}}
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[x]=[A]inv[b]={{{(matrix(3,1,1,-2,3))}}}