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

\

The equation is $\"\"$ .

\

According to subtraction property of equality: Subtract $\"\"$ from each side.

\

$\"\"$

\

$\"\"$ (Apply commutative property of addition: $\"\"$ )

\

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

\

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

\

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

\

$\"\"$ (Apply commutative property of addition: $\"\"$ )

\

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

\

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

\

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

\

According to division property of equality: Divide each side by 14.

\

$\"\"$

\

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

\

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

\

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

\

The value of $\"\"$ .