SYSTEMS OF EQUATIONS Cramer's Rule (Page 6 of 6)

Finally, compute the z-value of the solution, which is the determinant of matrix B divided by the determinant of matrix A (which is 25).

 2nd QUIT key. CLEAR key.

 MATRX key. [MATH] 1: menu selection. MATRX key. 2: menu selection. Right parenthesis key. Divide key. 25 ENTER key.

 Calculator screen image.

The z-coordinate of the solution is -2, therefore the solution to the system is the ordered triple (-1, 2, -2).
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