Usage

These problems are for self-practice and do not count towards your final grade.

Problems

1. Graph the following lines and find their intersection point: $y = 2x + 1$ and $y = -x + 4$

2. Convert the following system into an augmented matrix:

   $$3x - 2y + z = 0 \\ x + y - z = 5 \\ -2x + 4y = 7$$