It's easy enough to write it as an equation with 9 variables. Collect the integer terms, etc. There are a few constrains you can come up with knowing that the

It's easy enough to write it as an equation with 9 variables. Collect the integer terms, etc. There are a few constrains you can come up with knowing that they're all natural numbers. Beyond that though, I don't see a clever way to solve it beyond plugging in combinations, of which there would be a lot. Could write a script in 5 minutes to do it, but I guess that'd be cheating.