Question
The total mass of Emma, Mary and Kathy is 27t kg. Emma has a mass of 8t kg. Mary is 7 kg heavier than Emma.
  1. What is Kathy's mass in terms of t?
  2. If t = 10, what is Kathy's mass? 
3 m
(a)

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(b)

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The total mass of Emma, Mary and Kathy is 27t kg. Emma has a mass of 8t kg. Mary is 7 kg heavier than Emma.
  1. What is Kathy's mass in terms of t?
  2. If t = 10, what is Kathy's mass?