A magic marimba is made of gold, palladium, and copper. It has a total mass of 800 grams. If the gold and palladium together have a mass of 700 grams and the gold and copper together have a mass of 600 grams, what mass of gold would there be in the marimba?
Enter the number representing the mass of the gold into Certitude to reveal the cache coordinates.
*This puzzle cache is based on a cache in Texas created and hidden by DFW Challenger, who gets credit for the puzzle idea.
You can validate your puzzle solution with certitude.