SOLUTION: of a journey, 4/5 of the distance was covered on a plane and 1/4 by driving. 5 miles was spent walking, how many miles was total journey

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Question 938246: of a journey, 4/5 of the distance was covered on a plane and 1/4 by driving. 5 miles was spent walking, how many miles was total journey
Answer by josgarithmetic(39630) About Me  (Show Source):
You can put this solution on YOUR website!
d, the distance. POSITIVE value.

d-%284%2F5%29d-%281%2F4%29d=5, five miles was done walking.

LCD is 20.

20d%2F20-16d%2F20-5d%2F20=5
This will not work because it gives a negative number and d must be a positive number.

If 4/5 distance done through a plane and 1/4 distance done through driving, then this
is 4%2F5%2B1%2F4=%2816%2B5%29%2F20=21%2F20, MORE than the expected distance for the whole trip.