Question
If Elijah and Seth work together, they can complete a job in 12 days. If Elijah and Seth worked together for 6 days, followed by Seth who worked alone for the next 15 days, they can finish off the job.
  1. How many days would Seth need to complete the job alone? 
  2. How many days would Elijah need to complete the job alone?
4 m
(a)

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(b)

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If Elijah and Seth work together, they can complete a job in 12 days. If Elijah and Seth worked together for 6 days, followed by Seth who worked alone for the next 15 days, they can finish off the job.
  1. How many days would Seth need to complete the job alone? 
  2. How many days would Elijah need to complete the job alone?