Question
The total mass of Risa, Jaslyn and Emily is 31d kg. Risa has a mass of 9d kg. Jaslyn is 8 kg heavier than Risa.
  1. What is Emily's mass in terms of d?
  2. If d = 13, what is Emily's mass? 
3 m
(a)

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(b)

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The total mass of Risa, Jaslyn and Emily is 31d kg. Risa has a mass of 9d kg. Jaslyn is 8 kg heavier than Risa.
  1. What is Emily's mass in terms of d?
  2. If d = 13, what is Emily's mass?