Question
The total mass of Fiona, Elyse and Jen is 42r kg. Fiona has a mass of 9r kg. Elyse is 4 kg heavier than Fiona.
  1. What is Jen's mass in terms of r?
  2. If r = 10, what is Jen's mass? 
3 m
(a)

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(b)

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The total mass of Fiona, Elyse and Jen is 42r kg. Fiona has a mass of 9r kg. Elyse is 4 kg heavier than Fiona.
  1. What is Jen's mass in terms of r?
  2. If r = 10, what is Jen's mass?