Question
The total mass of Xuan, Usha and Anna is 31v kg. Xuan has a mass of 6v kg. Usha is 7 kg heavier than Xuan.
  1. What is Anna's mass in terms of v?
  2. If v = 15, what is Anna's mass? 
3 m
(a)

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(b)

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The total mass of Xuan, Usha and Anna is 31v kg. Xuan has a mass of 6v kg. Usha is 7 kg heavier than Xuan.
  1. What is Anna's mass in terms of v?
  2. If v = 15, what is Anna's mass?