If $(2, -3)$ is a solution of the equation $3x + ky = 18$,find the value of $k$.

If we multiply or divide both sides of a linear equation with a non-zero number,then the solution of the linear equation:

Draw the graph of the following linear equation in two variables:
$4x - 3y = 12$

Write whether the following statement is True or False? Justify your answer.
The coordinates of points given in the table:

$x$	$0$	$1$	$2$	$3$	$4$
$y$	$2$	$4$	$6$	$8$	$10$

represent some of the solutions of the equation $2x + 2 = y$.

Write the following equation in the standard form $ax + by + c = 0$ and indicate the values of $a, b,$ and $c$ in each case:
$0.2x + 0.5y = 1.2$

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