The equation is .

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

                     (Apply additive inverse property: )

                           (Apply additive identity property: )

                                 (Add: )

Check:

To check the solution, substitute    in original equation.

                               (Subtract: )

The statement is true.

To graph the solution on the number line;

\
• draw the number line
\
• mark a dot at 19 on the number line
\

The value of .