There are two containers, $$A$$ and $$B$$. Container $$A$$ has $$50\text{g}$$ of water with $$10 \%$$ concentration of sugar. Container $$B$$ has $$30\text{g}$$ of water with $$20 \%$$ concentration of sugar.  The same volume of sugar solution is removed from each container and transferred between the two containers, resulting in the concentration of sugar in both containers to become the same.  Find the volume of sugar solution transferred in grams. 
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