The equation you've provided is $2x - y = 4$.

Would you like me to solve for $x$, $y$, or express this equation in another form? For instance, I can solve it for one variable or rearrange it.

Here are some steps or possible approaches:

1. Solve for $x$ in terms of $y$.
2. Solve for $y$ in terms of $x$.
3. Rearrange it to slope-intercept form for graphing (i.e., $y = mx + b$).
4. Provide the equation of a line parallel or perpendicular to this one.
5. Combine this with another equation to solve as a system.

Tip: When graphing a line, converting the equation to slope-intercept form $y = mx + b$ makes it easier to plot.