Question
Eric bought 36 more pens than Harry and Harry bought 17 pens more than Betty. The total number of pens Eric and Harry bought was 4 times the number of pens Betty bought.
  1. How many pens does Eric need to give Harry so that they have the same number of pens?
  2. How many pens did all three of them have altogether? 
4 m
(a)

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(b)

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Eric bought 36 more pens than Harry and Harry bought 17 pens more than Betty. The total number of pens Eric and Harry bought was 4 times the number of pens Betty bought.
  1. How many pens does Eric need to give Harry so that they have the same number of pens?
  2. How many pens did all three of them have altogether?