Question 907373
Use Cramer's rule,
{{{A=(matrix(3,3,1,1,1,
                 2,4,2,
                -1,8,-3))}}}
{{{abs(A)=-4}}}
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{{{A[x]=(matrix(3,3,4,1,1,
                 6,4,2,
                -15,8,-3))}}}
{{{abs(A[x])=-16}}}
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{{{A[y]=(matrix(3,3,1,4,1,
                 2,6,2,
                -1,-15,-3))}}}
{{{abs(A[y])=4}}}
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{{{A[z]=(matrix(3,3,1,1,4,
                 2,4,6,
                -1,8,-15))}}}
{{{abs(A[z])=-4}}}
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{{{x=abs(A[x])/abs(A)=-16/(-4)=4}}}
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{{{y=abs(A[y])/abs(A)=4/(-4)=-1}}}
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{{{z=abs(A[z])/abs(A)=-4/(-4)=1}}}
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