Question
The average weight of 5 students is 40 kg. When the weights of Jack and Tom are included, the average weight becomes 46 kg. Tom is 7 kg lighter than Jack. What is Jack's weight?
3 m

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The average weight of 5 students is 40 kg. When the weights of Jack and Tom are included, the average weight becomes 46 kg. Tom is 7 kg lighter than Jack. What is Jack's weight?