$\"\"$

The equation is $\"\"$ .

Solve by algebraically.

Apply subtraction property of equality: Subtract 15 from each side.

$\"\"$

Apply commutative property of addition: a + b = b + a.

$\"\"$

$\"\"$ (Apply additive inverse property: $\"\"$ )

$\"\"$ (Simplify) $\"\"$

Apply division property of equality: Divide each side by 6.

$\"\"$

$\"\"$ (Cancel common terms) \ \

$\"\"$ (Divide: $\"\"$ )

The solution is $\"\"$ . $\"\"$

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