$\"\"$

The equation is $\"\"$ .

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

$\"\"$

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

$\"\"$ (Subtract 2z from each side) $\"\"$

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

$\"\"$

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

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

Apply division property of equality: Divide each side by 2.

$\"\"$

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

The solution is $\"\"$ .