Given equation is 2x + 1 = x - 3
That is 2x - x = -3 - 1
That is x = -4
Thus there is only one point on the number line that satisfies the equation x = - 4
The representation of the solution x = -4 on the number line is as follows:
On cartesian plane there are infinite number of solutions that satisfies the equation x = -4
On cartesian plane x = -4 is the line parallel to y - axis with a distance of 4 units from the y- axis in the negative direction.
Now let us observe the graph of the equation x = -4 on the cartesian plane.