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

The equation is $\"\"$

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

$\"\"$ (Subtract 6 from both sides)

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

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

$\"\"$ (Divide both sides by 3)

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

Check:

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

$\"\"$

$\"\"$ (Cancel common terms)

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

Compare the values, the equation is true. The solution is $\"\"$ .

$\"\"$

The value of $\"\"$ .