### Home > A2C > Chapter 2 > Lesson 2.1.1 > Problem2-7

2-7.

Solve the following systems of equations algebraically. Then graph each system to confirm your solution.

1. $x+y=3$
$x=3y-5$

1. $x-y=-5$
$y=-2x-4$

Replace $x$ with $3y − 5$.

Solve for $y$.

Solve for $x$.

Replace $y$ with $-2x - 4$.

Solve for $x$.

Solve for $y$.

In the eTool below type points into the tables to explore where the two graphs intersect.
Click on the link at right for the full eTool version: CCA2 A-7 HW eTool