Question 316922
[A]={{{(matrix(3,3,4,-6,7,2,3,-5,8,0,-2))}}}
[x]={{{(matrix(3,1,P,Q,R))}}}
[b]={{{(matrix(3,1,-7,7,6))}}}
.
.
.
det[A]={{{24}}}
.
.
.
[A]inv={{{(1/24)*(matrix(3,3,-6,-12,9,-36,-64,34,-24,-48,24))}}}
.
.
[x]={{{(matrix(3,1,1/2,1/3,-1))}}}