Question
The average weight of 8 pupils is 42 kg. When the weights of Japheth and Carl are included, the average weight becomes 46 kg. Carl is 10 kg lighter than Japheth. What is Japheth's weight?
3 m

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The average weight of 8 pupils is 42 kg. When the weights of Japheth and Carl are included, the average weight becomes 46 kg. Carl is 10 kg lighter than Japheth. What is Japheth's weight?