\"\"\"\"

\

The inequality is \"\".

\

Apply addition property of inequality: Add 6 to each side.

\
\

\"\"

\

\"\"

\

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

\

\"\"                   (Additive identity property: \"\")

\

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

\

\"\"       (Multiply each side by 4)   

\

\"\"              (Cancel common terms) 

\

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

\

\"\"              (Divide each side by 3)

\

\"\"                  (Cancel common terms) 

\

\"\"                    (Divide:\"\")

\

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

\

\"\"

\

Graph the solution set on a number line

\

\"number

\

Note: A dot means that this point is included in the solution set. \"\"

\

Check:

\

To check, substitute -20, a number less than -20, in \"\".

\

\"\"     (Substitute: d=\"\"20)

\

\"\"          (Divide:\"\" )

\

\"\"              (Multiply:\"\")

\

\"\"                 (Subtract:\"\")

\

\"\"

\

The inequality is true.

\

\"\"

\

The inequality solution set is \"\".