Question
The total mass of Winnie, Sarah and Elyse is 20p kg. Winnie has a mass of 8p kg. Sarah is 7 kg heavier than Winnie.
  1. What is Elyse's mass in terms of p?
  2. If p = 9, what is Elyse's mass? 
3 m
(a)

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(b)

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The total mass of Winnie, Sarah and Elyse is 20p kg. Winnie has a mass of 8p kg. Sarah is 7 kg heavier than Winnie.
  1. What is Elyse's mass in terms of p?
  2. If p = 9, what is Elyse's mass?