An X-Men  comic book in mint condition was sold for .

An Action Comics (Mile High) in mint condition sold for .

Find how much more did the X-Men comic book sell for than the Action Comics book.

Let  equal the difference in the price of the comic books .

The Action Comics book minus the difference equals the cost of X-Men book.

                                (Original equation)

  (Subtract  from each side)

                                           (Apply additive inverse property: )

Therefore,the X-men comic book sold for more than the Action Comic book.

The X-men comic book sold for more than the Action Comic book.