The expression is .

According to addition property of equality: If a = b then a + c = b + c

            (Add 5 to each side)

                  (Additive inverse property: )

                        (Additive identity property: )        

                            (Add: )

check:

To check the solution Substitute the value of  in above expression.

                              (Subtract: )

The value of

By the number line .