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

The equation is $\"\"$

Addition property of equality: if $\"\"$ , then $\"\"$ .

$\"\"$ (Add 6 to each side)

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

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

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

Check:

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

$\"\"$

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

Compare the values, the equation is true.

$\"\"$

The solution is $\"\"$ .