Question

Given a system of three linear equations in three variables where y = 8 and D = −4
(D is the determinant of the coefficient matrix), use Cramer’s Rule to find Dy.

Answer 1

-32 ? o.O

Answer 2

huh how u get the one before and how sure are u on that one?

Answer 3

Cramer's rule for three variables of x,y,z would be:
x=Dx/D;
y=Dy/D;
z=Dz/D;
the above answer of -32 is correct.