equation numbers

[William O. Bray]

Okay, I should know the answer to this, in LaTex I do. Using Lyx, ams article 
style, with ams packages, what modification is needed to get the equation 
numbers on the right? I know that righttag is an option for the amstex 
package but it is not clear how to obtain this in Lyx.
best regards, bill
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