Question
The mass of 2 boxes of maize and a packet of barley is 7 kg. The mass of each box of maize is 2 kg. The mass of a packet of barley is         .
4 m

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The mass of 2 boxes of maize and a packet of barley is 7 kg. The mass of each box of maize is 2 kg. The mass of a packet of barley is         .