If $(4,3)$ is a solution of equation $3 x-4 y=k,$ then find the value of $k$

Any point on the $y$ – axis is of the form

For what value of $c,$ the linear equation $2 x+c y=8$ has equal values of $x$ and $y$ for its solution.

The Autorikshaw fare in a city is charged $Rs.\, 10$ for the first kilometer and @ $Rs.\, 4$ per $kilometer$ for subsequent distance covered. Write the linear equation to express the above statement. Draw the graph of the linear equation.

Write each of the following as an equation in two variables

$3 y=-11$