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:

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• Draw the number line.
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• Mark a dot at on the number line.
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The value of  .