$\"\"$

The expression is $\"\"$ .

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

$\"\"$

$\"\"$ (Cancel common terms)

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

Check:

The original equation is $\"\"$ , substitute $\"\"$ .

$\"\"$

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

The solution is true. $\"\"$

The solution is $\"\"$ .