Question
The total mass of Xuan, Cathy and Kimberly is 39f kg. Xuan has a mass of 7f kg. Cathy is 8 kg heavier than Xuan.
  1. What is Kimberly's mass in terms of f?
  2. If f = 11, what is Kimberly's mass? 
3 m
(a)

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(b)

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The total mass of Xuan, Cathy and Kimberly is 39f kg. Xuan has a mass of 7f kg. Cathy is 8 kg heavier than Xuan.
  1. What is Kimberly's mass in terms of f?
  2. If f = 11, what is Kimberly's mass?