If $(-2, -3)$ is a solution of the equation $ax - 5y = 21$,then $a = \ldots$

Write four solutions for the equation $3x - 24 = 0$.

Draw the graph of each of the equations given below. Also,find the coordinates of the points where the graph intersects the coordinate axes:
$1. 3x + 5y = 15$
$2. 5x - 2y = 10$
$3. 4x + 3y = -12$
$4. 3x - 7y = 21$
$5. x - y = 0$
$6. 2x - 3y = 0$
$7. x - y = -5$
$8. 5x - 3y = 15$

The following values of $x$ and $y$ are thought to satisfy a linear equation:

$x$	$1$	$2$
$y$	$1$	$3$

Draw the graph,using the values of $x, y$ as given in the above table.
At what point does the graph of the linear equation:
$(i)$ cut the $x$-axis?
$(ii)$ cut the $y$-axis?

The graph of the equation $0x + 3y = 21$ is perpendicular to which axis?

Express the following linear equation in the form $ax + by + c = 0$ and indicate the values of $a, b,$ and $c$ in each case:
$\pi x - 3y = 18$