Substitution Method Page 1 of 5
Accompanying Resources: Study Guide, Activity, Assessment, Task Cards 

In this lesson, we'll focus on systems that have one solution. The system shown to the right consists of two linear equations: y = 2x + 3 and y = 3x + 13. You can see from the graph that the two lines cross at the point (2,7). This means that the solution to this system is (2,7). If you plug in 2 for x and 7 for y, they work in both equations. 