$\"\"$

\

The equation is $\"\"$ .

\

Distribute terms using distributive property: $\"\"$ .

\

$\"\"$

\

$\"\"$ $\"\"$

\

Add 4d to each side.

\

$\"\"$

\

$\"\"$

\

Subtract 36 from each side.

\

$\"\"$

\

$\"\"$ $\"\"$

\

Combine like terms using distributive property: $\"\"$ .

\

$\"\"$

\

$\"\"$

\

Divide each side by 7.

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

Check:

\

To check the solution, substitute $\"\"$ in original equation.

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

The solution is true. $\"\"$

\

The value of $\"\"$ .