Question
The mass of 2 boxes of oat and a packet of black bean is 13 kg. The mass of each box of oat is 4 kg. The mass of a packet of black bean is         .
4 m

Click button first when a symbol is required. X

The mass of 2 boxes of oat and a packet of black bean is 13 kg. The mass of each box of oat is 4 kg. The mass of a packet of black bean is         .