document.write( "Question 962284: When a plane flies with the wind, it can fly 896 miles in 4 hours. When the plane flies in the opposite direction, against the wind, it takes 7 hours to fly the same direction. What is the average velocity of the wind? \n" ); document.write( "
Algebra.Com's Answer #587875 by josgarithmetic(39625)\"\" \"About 
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r+w, speed with wind
\n" ); document.write( "r-w, speed against wind
\n" ); document.write( "w, speed of wind
\n" ); document.write( "d, distance refered
\n" ); document.write( "T, time against wind
\n" ); document.write( "t, time with wind
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\n" ); document.write( "UNKNOWN: r, w
\n" ); document.write( "KNOWN: d=896, T=7, t=4\r
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\n" ); document.write( "\n" ); document.write( "\"system%28%28r%2Bw%29T=d%2C%28r-w%29%2At=d+%29\"\r
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\n" ); document.write( "\n" ); document.write( "Final goal is to solve for r and w but get the value for w.
\n" ); document.write( "Solve for r and substitute to find w.
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