Question
The total mass of Justin and Tiffany is 8638 kg. Justin weighs 36512 kg. 
  1. What is Tiffany's mass?
  2. How much heavier than Justin is Tiffany?
4 m
(a)

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(b)

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The total mass of Justin and Tiffany is 8638 kg. Justin weighs 36512 kg. 
  1. What is Tiffany's mass?
  2. How much heavier than Justin is Tiffany?