For the equation $3x + 2y = 18$,if $x = 5$,then $y = \ldots$ (in $.5$)

Express the following linear equation in the form $ax + by + c = 0$ and indicate the values of $a, b$ and $c$ in each case:
$5x + 3y = 45$

The work done by a body on application of a constant force is the product of the constant force and the distance travelled by the body in the direction of force. Express this in the form of a linear equation in two variables and draw its graph by taking the constant force as $3$ units. What is the work done when the distance travelled is $2$ units? Verify it by plotting the graph.

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

"The price of a bat in a toy store is five times the price of a ball." Represent this statement as a linear equation in two variables.

Write the following as an equation in two variables:
$5x = -10$