Question

John takes one hour more than Rikki to rake the leaves from their yard in the fall. If the two work together, they can rake the leaves in 2 hours. How long does it take John, working alone, to rake the leaves? Round to the nearest tenth of an hour.
If John takes x hours, then Rikki takes (x-1) hours, and we have

1/x + 1/(x-1) = 1/2

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