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How to solve the whole thing I'm lost

How to solve the whole thing I'm lost-example-1

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61.5 = 3/4 of the way

So:

(61.5)/3 = 20.5 <---- This is 1/4 of the entire journey, and because he has gone 3/4 of the journey already, this is how long it will take him to get home.

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