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

\

The inequlaity is $\"\"$ .

\

Apply subtraction property of inequality: Subtract 13 from each side.

\

$\"\"$

\

\

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

\

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

\

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

\

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

\

Apply division property of inequality: Divide each side by 3.

\

$\"\"$

\

\

$\"\"$ (Cancel common terms) \ \

\

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

\

$\"\"$ (Multiply each side by negative one and flip the symbol)

\

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

\

Check:

\

To substitute a number greater than 7 in $\"\"$ .

\

$\"\"$ (Substitute n = 8)

\

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

\

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

\

The inequality is true $\"\"$

\

The inequality solution set is $\"\"$ .