$\"\"$

The equation is $\"\"$ .

Apply subtraction property of equality: If a = b then a – c = b – c.

$\"\"$ (Subtract 9x from each side)

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

$\"\"$

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

Apply division property of equality: If a = b then $\"\"$ .

$\"\"$ (Divide each side by 3)

$\"\"$ (Cancel common terms)

$\"\"$ (Apply standard division form: $\"\"$ )

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

The solution is $\"\"$ .