$\"\"$

\

The equation is $\"\"$ .

\

$\"\"$ (Add 2 to each side)

\

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

\

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

\

$\"\"$ (Divide each side by 5) $\"\"$

\

$\"\"$ (Cancel common terms)

\

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

\

$\"\"$ (Multiply each side by negative one)

\

$\"\"$ (Product of two same signs is positive) $\"\"$

\

Check:

\

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

\

$\"\"$

\

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

\

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

\

The equality is true. $\"\"$

\

The value of $\"\"$ .