SOLUTION: X+5y-4z=20
-3x-14y+z=-25
5x-8y-2z=-20
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Question 1002471: X+5y-4z=20
-3x-14y+z=-25
5x-8y-2z=-20
Answer by ikleyn(52864) (Show Source): You can put this solution on YOUR website!
.
X+5y-4z=20
-3x-14y+z=-25
5x-8y-2z=-20
Using the Cramer's rule
(see the lesson Solving systems of linear equations in three unknowns using determinant (Cramer's rule) in this site):
Determinant is D = -345.
Dx = 690. -----> x = = = -2.
Dy = -690. ----> y = = = 2.
z = = = = = -3.
Answer. x = -2, y = 2, z = -3.
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