The equation is .

Apply addition property of equality: Add 4 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:

\
• First draw the number line
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• Mark a dot at on the number line
\

The value of .