Question
The total mass of Kathy, Opal and Gabby is 27d kg. Kathy has a mass of 4d kg. Opal is 8 kg heavier than Kathy.
  1. What is Gabby's mass in terms of d?
  2. If d = 9, what is Gabby's mass? 
3 m
(a)

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(b)

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The total mass of Kathy, Opal and Gabby is 27d kg. Kathy has a mass of 4d kg. Opal is 8 kg heavier than Kathy.
  1. What is Gabby's mass in terms of d?
  2. If d = 9, what is Gabby's mass?