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Help me on B plz cant work it out

Help me on B plz cant work it out-example-1
User Midas
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1 Answer

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Answer:

1kg = 1000g

400g = 0,4 kg

0,4 - 1

1 - n

multiply diagonally

0,4*n = 1

n=10/4=2,5

1:2,5 is correct answer

Explanation:

User Dlumpp
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