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Answer on Algebra Question for lyr

Question #33997
A new machine that deposits cement for a road requires 16 hours to complete a one-half mile section of road. An older machine requires 18 hours to pave the same amount of road. After depositing cement for 9 hours, the new machine develops a mechanical problem and quits working. The older machine is brought into place and continues the job. How long does it take the older machine to complete the job? (Round your answer to one decimal place.)
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