document.write( "Question 450439: A plane flies 450 mi/h. It can travel 980 miles with a wind in the same amount of time as it travels 820 miles against the wind. Find the speed of the wind.\r
\n" ); document.write( "\n" ); document.write( "You would use T = D/R to solve, correct?\r
\n" ); document.write( "\n" ); document.write( "Distance = 980 mi, 820 mi
\n" ); document.write( "Time = x
\n" ); document.write( "Rate = 450 mi/h \n" ); document.write( "
Algebra.Com's Answer #309811 by mananth(16946)\"\" \"About 
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plane speed = 450 mph
\n" ); document.write( "wind speed = x mph
\n" ); document.write( "wind speed
\n" ); document.write( "spee against current 450-x
\n" ); document.write( "speed with current 450+ x
\n" ); document.write( "Distance against wind 820 miles
\n" ); document.write( "Distance with wind 980 miles
\n" ); document.write( "t=d/r time against = time with
\n" ); document.write( "820/(450-x)=980 /(450+x)
\n" ); document.write( "820(450 +x)=980 (450-x)
\n" ); document.write( "369000+820x=441000-980 x
\n" ); document.write( "980x-820x=72000
\n" ); document.write( "1800x=72000
\n" ); document.write( "/1800
\n" ); document.write( "x=40mph wind speed 0.92
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