Linear Equation...

How many linear equations in $x$ and $y$ can be satisfied by $x = 1$ and $y = 2$?

The condition that the equation $ax + by + c = 0$ represent a linear equation in two variables is :

The linear equation $x = 5$ in two variables can be written as :

Linear equation in one variable is :

Age of $x$ exceeds the age of $y$ by 7yrs. This statement can be expressed as the linear equation as :

The equation $x = 7$, in two variables, can be written as

Two points with coordinates $(2, 3)$ and $(2, 1)$ lie on a line. Then $(i)$ the line is parallel to which axis? $(ii)$ Justify your answer.

Which of the following equation represents a straight line which is parallel to the $x$-axis and at a distance $3$ units below it?

$4x-3=0$ is a line parallel to