An advertising ﬁrm has an old computer that can prepare a whole mailing in 6 hours.
With the help of a newer model the job is complete in 2 hours. How long would it
take the newer model to do the job alone?

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I got 1/6 +1/x = 1/2 then 1/x = 1/2 -1/6 = 1/3

I got 1/x = 1/3 what's next?

your goal is to solve \(x\)

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