2/5 + 1/5 + 1/x = 1
x = 5/2
Alice can complete a certain job in 5 hours she had been working on the job for two hours when a friend came along. And helped her finish together they completed the job in 1 hr how long would it take alices friend to complete a job on her own. I have 1 fifth plus 1 over1 equals 1 over x for 1 and one fifth hours
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