What to do when I don't understand an answer and author don't reply?

Solve for x $ \sin 30° \sin x \sin 10° = \sin 20° \sin ({80°-x}) \sin 40° $

So someone answered my question and I don't understand a part of it. I asked the author and I did get a reply but it's not helpful enough. What to do in such cases? Should I ask a separate question on the main site regarding it?

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