Question
57 of the pens in a bag were purple and the rest were yellow and silver. 25% of the yellow pens and 10% of the silver pens were thrown away. There was an equal number of yellow and silver pens left. If there were 396 yellow and silver pens left,
  1. What was the number of purple pens?
  2. What was the total number of pens in the bag at first?
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(a)

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(b)

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57 of the pens in a bag were purple and the rest were yellow and silver. 25% of the yellow pens and 10% of the silver pens were thrown away. There was an equal number of yellow and silver pens left. If there were 396 yellow and silver pens left,
  1. What was the number of purple pens?
  2. What was the total number of pens in the bag at first?