How to number the equations

[Zhenhua Wu]

Hello, everyone,

I am new to the LyX, I am using LyX 1.4.1 under the Fedora 5. I want to
know how to number the equations.

Before sending this mail, I read the help file, but the solution is for
the early version, since I can do nothing with the help's suggestion.

When I edit the TeX source file, I try to add the equations environment
to number the equations, but, when I import the TeX file into the LyX
and try to preview the dvi file, it failed.

Can anyone help me?

Best wishes,

      * Zhenhua