Question
The total mass of Marion, Emily and Shiyun is 33a kg. Marion has a mass of 9a kg. Emily is 9 kg heavier than Marion.
  1. What is Shiyun's mass in terms of a?
  2. If a = 11, what is Shiyun's mass? 
3 m
(a)

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(b)

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The total mass of Marion, Emily and Shiyun is 33a kg. Marion has a mass of 9a kg. Emily is 9 kg heavier than Marion.
  1. What is Shiyun's mass in terms of a?
  2. If a = 11, what is Shiyun's mass?