Question 318175
[A]={{{(matrix(3,3,3,3,2,2,-4,5,4,1,-3))}}}
[x]={{{(matrix(3,1,x,y,z))}}}
[b]={{{(matrix(3,1,15,9,-3))}}}
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[A][x]=[b]
[x]=[A]inv[b]
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det[A]={{{135}}}
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[A]inv={{{(1/135)*(matrix(3,3,7,11,23,26,-17,-11,18,9,-18))}}}
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[x]={{{(matrix(3,1,1,2,3))}}}