Question 948888
Use Cramer's rule,
{{{A=(matrix(3,3,
4,2,1,
3,-4,5,
1,1,-3))}}}
{{{abs(A)=63}}}
.
.

{{{A[x]=(matrix(3,3,
-1,2,1,
-13,-4,5,
7,1,-3))}}}
{{{abs(A[x])=0}}}
.
.
{{{A[y]=(matrix(3,3,
4,-1,1,
3,-13,5,
1,7,-3))}}}
{{{abs(A[y])=36}}}
.
.
{{{A[z]=(matrix(3,3,
4,2,-1,
3,-4,-13,
1,1,7))}}}
{{{abs(A[z])=-135}}}
.
.
{{{x=abs(A[x])/abs(A)=0/63=0}}}
.
.
{{{y=abs(A[y])/abs(A)=36/63=4/7}}}
.
.
{{{z=abs(A[z])/abs(A)=-135/63=-15/7}}}
.
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