Question
The total mass of Sarah, Betty and Gabby is 37x kg. Sarah has a mass of 9x kg. Betty is 9 kg heavier than Sarah.
  1. What is Gabby's mass in terms of x?
  2. If x = 15, what is Gabby's mass? 
3 m
(a)

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(b)

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The total mass of Sarah, Betty and Gabby is 37x kg. Sarah has a mass of 9x kg. Betty is 9 kg heavier than Sarah.
  1. What is Gabby's mass in terms of x?
  2. If x = 15, what is Gabby's mass?