One of the solutions of the linear equation $3 x+5 y=30$ is $\ldots \ldots . .$

Graph of equation $0 x+3 y=21,$ is perpendicular to which axis ?

Draw the graph of the linear equation $3 x+4 y=6$. At what points, the graph cuts the $x$ -axis and the $y$ -axis.

The autorickshaw fare in a city is as follows 

For the first kilometre, the fare is ₹ $10,$ for the subsequent distance it is ₹ $3$ per $km$. Taking the distance covered as $x$ $km$ and total fare as ₹ $y,$ write a linear equation for this information and draw its graph. Find the total fare for a journey of $4$ kilometres from the graph.

If the point $(-2,5)$ lies on the graph of the equation $a x+3 y=7,$ find the value of $a$.