$\"\"$

The equation is $\"\"$ .

Apply addition property of equality: Add 14 to each side.

$\"\"$

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

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

Apply division property of equality: Divide each side by 7.

$\"\"$

$\"\"$ (Cancel common terms)

$\"\"$ (Divide: $\"\"$ ) $\"\"$

Check:

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

$\"\"$

$\"\"$ (Multiply: $\"\"$ )

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

The equality is true. $\"\"$

The value of $\"\"$ .