Question 343475
[A]={{{(matrix(3,3,2,-5,7,3,-8,2,1,1,3))}}}
[x]={{{(matrix(3,1,x,y,z))}}}
[b]={{{(matrix(3,1,12,2,8))}}}
.
.
.
[A][x]=[b]
[x]=[A]inv[b]
.
.
.
Find the inverse of [A].
.
.
det[A]={{{60}}}
.
.
[A]inv={{{(1/60)*(matrix(3,3,-26,22,46,-7,-1,17,11,-7,-1))}}}
.
.
[x]={{{(matrix(3,1,5/3,5/6,11/6))}}}