If $(3,2)$ is one of the solutions of $5 x-a y=7,$ then $a=\ldots \ldots \ldots$

Write whether the following statements are True or False? Justify your answers.

$(i)$ The line parallel to the $y$ -axis at a distance $4$ units to the left of $y$ -axis is given by the equation $x=-4$

$(ii)$ The graph of the equation $y=m x+c$ passes through the origin.

The linear equation $3 x-y=x-1$ has:

How many linear equations in $x$ and $y$ can be satisfied by $x =1$ and $y =2 ?$

Write each of the following as an equation in two variables

$5 x=-10$