$\"\"$

\

The expression is $\"\"$ .

\

$\"\"$ (Write the equation)

\

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

\

$\"\"$ (Group like terms)

\

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

\

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

\

$\"\"$ (Subtract 7 from each side)

\

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

\

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

\

$\"\"$ (Divide each side by 3)

\

$\"\"$ (Cancel common terms)

\

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

\

The solution is $\"\"$ . $\"\"$

\

The solution is $\"\"$ .