Beginning Algebra With Applications, Chapter 6, 6.1, Section 6.1, Problem 56

Solve $
\begin{equation}
\begin{aligned}

x-y =& 5 \\
2x+y =& 4

\end{aligned}
\end{equation}
$ by graphing.








Graph each line.
The graph of the equations
intersect at one point.
The system of equations is
independent.
The solution is (3,-2).