CPM Homework Help : A2C Problem 6-27

Solve the system of equations below.

$\begin{array}{r} x+y=−3\\2x−y=−6\\3x−2y+5z=16 \end{array}$

Hint:

All of the strategies for solving systems of two variables still apply.

More Help:

Use the first two equations to solve for $x\ \text{and}\ y$ .