$\"\"$ $\"\"$

The equation is $\"\"$ .

According to subtraction property of equality: Subtract 6 from each side.

$\"\"$

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

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

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

The value of $\"\"$ .