$\"\"$

The equation is $\"\"$ .

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

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

Apply commutative property of addition: $\"\"$ .

$\"\"$

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

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

$\"\"$ (Subtract: $\"\"$ ) $\"\"$

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

$\"\"$ (Divide each side by 2)

$\"\"$ (Cancel common terms)

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

The solution is $\"\"$ .