Check whether $(4, 0)$ is a solution of the equation $x - 2y = 4$.

Write each of the following as an equation in two variables:
$(i)$ $x = -5$
$(ii)$ $y = 2$
$(iii)$ $2x = 3$
$(iv)$ $5y = 2$

Write four solutions for the equation: $\pi x + y = 9$

Solve the equation $2x + 1 = x - 3$,and represent the solution$(s)$ on
$(i)$ the number line,
$(ii)$ the Cartesian plane.

The taxi fare in a city is as follows:
For the first kilometre,the fare is Rs. $8$ and for the subsequent distance it is Rs. $5$ per $km$. Taking the distance covered as $x \, km$ and total fare as Rs. $y$,write a linear equation for this information,and draw its graph.

Draw the graph of the linear equation in two variables: $3 = 2x + y$