$\"\"$

The equation is $\"\"$ .

Solve by algebraically.

$\"\"$ (Subtract 15 from each side)

$\"\"$ (Simplify)

$\"\"$ (Divide each side by 6)

$\"\"$ (Divide: $\"\"$ ) \ \ The solution is $\"\"$ . $\"\"$

The root of the equation $\"\"$ is $\"\"$ .