Posted by **Bogusgirl** on Monday, December 3, 2012 at 6:37pm.

A box containing 5 red balls and 3 green balls weighs 43 g. When the box contains 3 red balls and 5 red balls it weighs 37g. When it contains one ball of each it weighs 19g. What is the mass of the box and of each ball.

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