### Home > CCA2 > Chapter 4 > Lesson 4.2.2 > Problem4-83

4-83.

Solve the system of equations below. What sub-problems did you need to solve? Homework Help ✎

$x+2y=4$
$2x−y=−7$
$x+y+z=−4$

Use the first two equations to solve for $x$ and $y$ using the Elimination Method.

$−2(x+2y)=−2(4)$

$2x−y=−7$

Now that you know $x$ and $y$, how can you find $z$?

$x=−2,y=3,z=−5$