$\"\"$

The equation is $\"\"$ and the point is $\"\"$ .

To find the value of B, substitute the value of $\"\"$ in the original equation $\"\"$ .

$\"\"$

Add 40 to each side.

$\"\"$

$\"\"$ . $\"\"$

Divide each side by 4.

$\"\"$

$\"\"$ .

To write the completed equation, substitute the value of $\"\"$ in the original equation $\"\"$ . $\"\"$

The value of $\"\"$ and the completed equation is $\"\"$ .