Question
The total mass of Olivium, Opal and Barbara is 35a kg. Olivium has a mass of 7a kg. Opal is 3 kg heavier than Olivium.
  1. What is Barbara's mass in terms of a?
  2. If a = 9, what is Barbara's mass? 
3 m
(a)

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(b)

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The total mass of Olivium, Opal and Barbara is 35a kg. Olivium has a mass of 7a kg. Opal is 3 kg heavier than Olivium.
  1. What is Barbara's mass in terms of a?
  2. If a = 9, what is Barbara's mass?