Question 370213
[A]={{{(matrix(3,3,1,2,1,3,7,-2,1,-1,-6))}}}
[x]={{{(matrix(3,1,x,y,z))}}}
[b]={{{(matrix(3,1,-3,25,27))}}}
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det[A}={{{-22}}}
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[A]inv={{{-(1/22)*(matrix(3,3,-44,11,-11,16,-7,5,-10,3,1))}}}
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[x]={{{(matrix(3,1,-5,4,-6))}}}