Question 902108
Use Cramer's rule.
{{{A=(matrix(3,3,1,8,3,3,-2,1,2,-3,2))}}}
{{{abs(A)=-48}}}
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{{{A[1]=(matrix(3,3,-31,8,3, -5,-2,1 ,6,-3,2))}}}
{{{abs(A[1]) =240}}}
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{{{A[2]=(matrix(3,3,1,-31,3,  3,-5,1 ,2,6,2))}}}
{{{abs(A[2])  =192}}}
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{{{A[3]=(matrix(3,3,1,8,-31,  3,-2,-5,2,-3,6))}}}
{{{abs(A[3])  =-96}}}
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{{{i[1]=abs(A[1])/abs(A)}}}
{{{i[1]=240/(-48)}}}
{{{i[1]=-5}}}
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{{{i[2]=abs(A[1])/abs(A)}}}
{{{i[2]=192/(-48)}}}
{{{i[2]=-4}}}
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{{{i[3]=abs(A[1])/abs(A)}}}
{{{i[3]=(-96)/(-48)}}}
{{{i[3]=2}}}
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