In a Cartesian plane,the graph of $x=0$ is $\ldots \ldots \ldots$

At what point does the graph of the linear equation $x+y=5$ meet a line which is parallel to the $y$-axis,at a distance $2$ units from the origin and in the positive direction of the $x$-axis?

Find the common solution of the equations $x + y = 0$ and $x - y = 0$.

Show that the points $A(1, 2)$,$B(-1, -16)$,and $C(0, -7)$ lie on the graph of the linear equation $y = 9x - 7$.

Write four solutions for the following equation: $4y - 11 = 0$.

Determine the point on the graph of the equation $2x + 5y = 20$ whose $x$-coordinate is $\frac{5}{2}$ times its ordinate.