Solve by using the inverse of the coefficient matrix
x 2y 3z=b_(1) 2x 5y 5z=b_(z) 3x 5y 8z=b_(3)
Given
|[a,b,c],[d,e,f],[g,h,i]|=-9
Find a.
|3A|
b.
|A^(-1)|
e)
|[a,g,d],[b,h,e],[c,i,f]|
c.
|3A^(-1)|
d.
|(3A)^(-1)|