CPM Homework Help : CCA2 Problem 7-163

Solve this system of equations:

$5x − 4y − 6z = −19\\ −2x + 2y + z = 5\\ 3x − 6y − 5z = −16$

Hint:

Use the Elimination Method to eliminate $y$ from the first and second equations.

More Help 1:

Use the Elimination Method to eliminate $y$ from the second and third equations.

More Help 2:

Use the two new equations you have formed to solve for $x\ \text{and}\ z$ . Remember to solve for $y$ as well.