Question
The total mass of Fiona, Isla and Gem is 38b kg. Fiona has a mass of 7b kg. Isla is 7 kg heavier than Fiona.
  1. What is Gem's mass in terms of b?
  2. If b = 10, what is Gem's mass? 
3 m
(a)

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(b)

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The total mass of Fiona, Isla and Gem is 38b kg. Fiona has a mass of 7b kg. Isla is 7 kg heavier than Fiona.
  1. What is Gem's mass in terms of b?
  2. If b = 10, what is Gem's mass?