SOLUTION: A plane flies 510 miles in 3 hours with the wind. Going against the same wind the plane flies 390 miles in 3 hours. Which of the following is three times the speed of the wind plus

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Question 1191199: A plane flies 510 miles in 3 hours with the wind. Going against the same wind the plane flies 390 miles in 3 hours. Which of the following is three times the speed of the wind plus twice the speed of the plane in calm air (no wind)?
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
With the wind, and against the wind:
system%28r%2Bw=510%2F3%2Cr-w=390%2F3%29

system%28r%2Bw=170%2Cr-w=130%29
Find whatever you need from the system.

system%28r=150%2Cand%2Cw=20%29
.
.