There's more than one way to do this.

You could solve for y, and then you'll have the y-intercept and slope. That's enough to plot a second line.

Or, perhaps easier, you could just calculate both intercepts directly, plot those two points, and draw a line through them.

You know that the intercepts take the form (x, 0) and (0, y), right?

In other words, substitute zero for y, and solve for the x-intercept.

Substitute zero for x, and solve for the y-intercept.