Problem statement
x! = (7!)! / 7! # solve for x
Solution
Let 7! be N. Re-express as
x! = N! / N
that's the same as
x! = (N - 1)!
so
x = (N - 1)
ergo
x = 7! - 1
which is
5039
Problem statement
x! = (7!)! / 7! # solve for x
Solution
Let 7! be N. Re-express as
x! = N! / N
that's the same as
x! = (N - 1)!
so
x = (N - 1)
ergo
x = 7! - 1
which is
5039