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

\

The equation is $\"\"$

\

According to addition property of equality: Add 2 to each side.

\

$\"\"$

\

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

\

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

\

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

\

According to division property of equality:Divide each side by 4.

\

$\"\"$

\

$\"\"$ (Cancel common terms)

\

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

\

Check:

\

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

\

$\"\"$

\

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

\

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

\

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

\

The value of $\"\"$ .