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