Question
The total mass of 3 wine bottles and 9 picture frames is 16.5 kg. The total mass of 1 wine bottle and 2 picture frames is 4.1 kg. What is the mass of each picture frame?
4 m

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The total mass of 3 wine bottles and 9 picture frames is 16.5 kg. The total mass of 1 wine bottle and 2 picture frames is 4.1 kg. What is the mass of each picture frame?