Question
The total mass of Paul and Ivan is 49.5 kg. The total mass of Ivan and Justin is 47.1 kg. If the total mass of Paul and Justin is 52 kg, find the mass of Justin.
4 m

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The total mass of Paul and Ivan is 49.5 kg. The total mass of Ivan and Justin is 47.1 kg. If the total mass of Paul and Justin is 52 kg, find the mass of Justin.