Question
The mass of 10 novels and 3 colouring books is 1.6 kg. The mass of 4 novels and 7 colouring books is 1.22 kg. Find the mass of each colouring book.
4 m

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The mass of 10 novels and 3 colouring books is 1.6 kg. The mass of 4 novels and 7 colouring books is 1.22 kg. Find the mass of each colouring book.