Question
The total mass of Hazel, Barbara and Gem is 21m kg. Hazel has a mass of 4m kg. Barbara is 3 kg heavier than Hazel.
  1. What is Gem's mass in terms of m?
  2. If m = 15, what is Gem's mass? 
3 m
(a)

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(b)

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The total mass of Hazel, Barbara and Gem is 21m kg. Hazel has a mass of 4m kg. Barbara is 3 kg heavier than Hazel.
  1. What is Gem's mass in terms of m?
  2. If m = 15, what is Gem's mass?