Question
The mass of 2 boxes of peppercorn and a bag of brown rice is 14 kg. The mass of each box of peppercorn is 3 kg. The mass of a bag of brown rice is         .
4 m

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The mass of 2 boxes of peppercorn and a bag of brown rice is 14 kg. The mass of each box of peppercorn is 3 kg. The mass of a bag of brown rice is         .