Question 912519
Use Cramer's rule,
{{{A=(matrix(3,3,
3,-4,1,
7,1,-3,
5,4,-3))}}}
{{{abs(A)=26}}}
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{{{A[x]=(matrix(3,3,
29,-4,1,
26,1,-3,
7,4,-3))}}}
{{{abs(A[x])=130}}}
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{{{A[y]=(matrix(3,3,
3,29,1,
7,26,-3,
5,7,-3))}}}
{{{abs(A[y])=-78}}}
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{{{A[z]=(matrix(3,3,
3,-4,29,
7,1,26,
5,4,7))}}}
{{{abs(A[z])=52}}}
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{{{x=abs(A[x])/abs(A)=130/26=5}}}
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{{{y=abs(A[y])/abs(A)=(-78)/26=-3}}}
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{{{z=abs(A[z])/abs(A)=52/26=2}}}
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