Question
The total mass of Ivory, Pamela and Elyse is 21b kg. Ivory has a mass of 7b kg. Pamela is 8 kg heavier than Ivory.
  1. What is Elyse's mass in terms of b?
  2. If b = 13, what is Elyse's mass? 
3 m
(a)

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(b)

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The total mass of Ivory, Pamela and Elyse is 21b kg. Ivory has a mass of 7b kg. Pamela is 8 kg heavier than Ivory.
  1. What is Elyse's mass in terms of b?
  2. If b = 13, what is Elyse's mass?