document.write( "Question 578022:
\n" ); document.write( "A plane flies at x miles per hour in still air. Flying with a tailwind, its speed is 485 miles per hour. Against the wind, its air speed is only 445 miles per hour. What is the speed of the wind?
\n" ); document.write( "

Algebra.Com's Answer #370465 by dfrazzetto(283)\"\" \"About 
You can put this solution on YOUR website!
x+wind = 485
\n" ); document.write( "x-wind = 445 multiply by -1\r
\n" ); document.write( "\n" ); document.write( "x+wind =485
\n" ); document.write( "-x+wind = -445
\n" ); document.write( "____________________\r
\n" ); document.write( "\n" ); document.write( "2(wind) = 40
\n" ); document.write( "wind = 20 mph\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "x=465 mph
\n" ); document.write( "
\n" );