Do you mean y=-5x-13? This is the equation of a line with slope -5 and y intercept -13. It is already in slope-intercept form. y depends on x so it's not an equation that can be solved because there are many solutions, represented by the line when graphed. The line slopes backward and cuts the y axis at -13 and the x axis when 5x=-13 or x=-2.6. Draw a line passing through these two points and you have the graph.