$\"\"$

\

The literal equation is $\"\"$ .

\

Solve $\"\"$ for a.

\

Multiply each side by ab.

\

$\"\"$

\

Cancel common terms.

\

$\"\"$

\

Subtract $\"\"$ from each side.

\

$\"\"$

\

$\"\"$

\

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

\

The value of $\"\"$ .