Question
The total mass of Penelope, Eva and Yoko is 25a kg. Penelope has a mass of 9a kg. Eva is 9 kg heavier than Penelope.
  1. What is Yoko's mass in terms of a?
  2. If a = 12, what is Yoko's mass? 
3 m
(a)

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(b)

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The total mass of Penelope, Eva and Yoko is 25a kg. Penelope has a mass of 9a kg. Eva is 9 kg heavier than Penelope.
  1. What is Yoko's mass in terms of a?
  2. If a = 12, what is Yoko's mass?