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If A runs 6 hours and B 9 hours, a tank fills; if A runs 8 hours and B 6 hours, it also fills. How long does A take alone?

Class 10Work Rates with Two UnknownsAlgebra — Systems of Equations
  • A18 hours
  • B15 hours
  • C12 hours
  • D9 hours

Step-by-Step Solution

. Multiply: .
Answer: C) 12 hours

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