$\"\"$

The equation is $\"\"$ .

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

$\"\"$ (Subtract 6 from each side)

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

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

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

$\"\"$ (Multiply each side by negative 1)

$\"\"$ (Product of two same signs is positive) $\"\"$

Check:

To check the solution, substitute $\"\"$ in original equation.

$\"\"$

$\"\"$ (Add: $\"\"$ )

The statement is true. $\"\"$

The value of $\"\"$ .