document.write( "Question 1037342: A plane can fly 312 miles with the wind in 3 hours, while it takes the same plane 4 hours to fly the same distance against the wind. Find the speed of the plane in still air, and the speed of the wind. \n" ); document.write( "
Algebra.Com's Answer #652020 by josgarithmetic(39617)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "                RATE           TIME         DISTANCE\r\n" );
document.write( "WITH            r+w             3            312               \r\n" );
document.write( "AGAINST         r-w             4            312\r\n" );
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\n" ); document.write( "\n" ); document.write( "\"system%28%28r%2Bw%293=312%2C%28r-w%294=312%29\"
\n" ); document.write( "Solve the LINEAR system for r and w.\r
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\n" ); document.write( "\n" ); document.write( "Algebra steps:
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\n" ); document.write( "\"system%28r%2Bw=312%2F3%2Cr-w=312%2F4%29\"
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\n" ); document.write( "\"system%28r%2Bw=104%2Cr-w=78%29\"
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\n" ); document.write( "\"r%2Bw%2Br-w=104%2B78\"
\n" ); document.write( "\"2r=182\"
\n" ); document.write( "\"highlight%28r=91%29\"
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