Question
The total mass of Opal, Rachel and Anna is 42t kg. Opal has a mass of 5t kg. Rachel is 2 kg heavier than Opal.
  1. What is Anna's mass in terms of t?
  2. If t = 15, what is Anna's mass? 
3 m
(a)

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(b)

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The total mass of Opal, Rachel and Anna is 42t kg. Opal has a mass of 5t kg. Rachel is 2 kg heavier than Opal.
  1. What is Anna's mass in terms of t?
  2. If t = 15, what is Anna's mass?