document.write( "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)? \n" ); document.write( "
Algebra.Com's Answer #822992 by josgarithmetic(39618)\"\" \"About 
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With the wind, and against the wind:
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\n" ); document.write( "\n" ); document.write( "\"system%28r%2Bw=170%2Cr-w=130%29\"
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\n" ); document.write( "\n" ); document.write( "\"system%28r=150%2Cand%2Cw=20%29\"\r
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