Question 388406
[A]={{{(matrix(3,3,1,-1,2,1,-3,1,2,-1,-1))}}}
[x]={{{(matrix(3,1,x,y,z))}}}
[b]={{{(matrix(3,1,6,8,5))}}}
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[A][x]=[b]
[x]=[A]inv[b]
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det[A]={{{11}}}
Using matrix inversion,
[A]inv={{{(1/11)*(matrix(3,3,4,-3,5,3,-5,1,5,-1,-2))}}}
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[x]={{{(1/11)*(matrix(3,1,25,-17,12))}}}