3v-9=7+2v-v

3v - 9 = 7 + 2v - v I'm assuming this is the equation. If not leave a note. Combine vs.

3v - 9 = 7+v Add 9 to both sides.

3v = 7 + 9 + v

3v = 16 + v Subtract v from both sides.

3v - v = 16

2v = 16 Divide by 2

v = 16/2

v = 8

Solutions 

The equation of a horizontal line is y=value. The slope of a horizontal line is 0. The y-coordinate of every point on the graph of a horizontal line is value (y=value). The equation of a vertical line is x=value. The slope of a vertical line is undefined. The x-coordinate of every point on the graph or vertical line is value (x=value).

The general form of the equation of a line isax+by=c. Every line has an equation that can be written in slope-intercept form. When a graphing utility is used to sketch a straight line, the graph of the line may not visually appear to have the slope indicated by its equation because the tick marks are not equally spaced