The equation is  .

Apply subtraction property of equality: Subtract 5 from each side.

                          (Apply additive inverse property: )

                                (Apply additive identity property: )

                                      (Subtract:    )

Check:

To check the solution, substitute  in original equation.

                                    (Add: 13 + 5 = 18)

The statement is true.

Graph the solution on number line.

\
• First draw a number line.
\
• Mark a dot at 13 on  the number line.
\

The value of x = 13.