$\"\"$

\

The equation is $\"\"$ .

\

According to subtraction property of equality; if a = b, then a(b + c). \

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

\

$\"\"$ (Additive inverse property: $\"\"$ )

\

\

\

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

\

\

$\"\"$ (Subtract 3 from each side)

\

$\"\"$ (Additive inverse property: $\"\"$ )

\

\

\

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

\

\

$\"\"$

\

$\"\"$ (Divide both sides by $\"\"$ )

\

$\"\"$ (Cancel common terms)

\

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

\

$\"\"$

\

Check:

\

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

\

$\"\"$

\

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

\

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

\

Compare the values, the equation is true.

\

$\"\"$

\

The value of $\"\"$ .

\