If the graph of the equation $3x + ay = 7$ passes through the point $(3, -1)$,then the value of $a$ is:

If $(5, 2)$ is one of the solutions of the equation $x + 3y = k$,then $k = \ldots$

The autorickshaw fare in a city is as follows: For the first kilometre,the fare is ₹ $10$,and for the subsequent distance,it is ₹ $3$ per $km$. Taking the distance covered as $x$ $km$ and the 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 $(3, 2)$ is one of the solutions of $5x - ay = 7$,then $a = \dots$

The graph of the equation $3x = 10$ is parallel to which axis?

If the point $(3, 5)$ lies on the graph of the equation $ax + y = 20$,find the value of $a$.