document.write( "Question 552626: Plane travels 1,176 miles to Miami and back. Going there took 14 hours. The trip back took 28 hours. What was the planes airspeed and the windspeed? \n" ); document.write( "
Algebra.Com's Answer #360444 by josmiceli(19441)\"\" \"About 
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Let \"s\" = speed in still air
\n" ); document.write( "Let \"w\" = wind speed
\n" ); document.write( "\"+s+%2B+w+\" = the speed for 14 hr trip ( with the wind )
\n" ); document.write( "\"+s+-+w+\" = the the speed for 28 hr trip ( against the wind )
\n" ); document.write( "-------------
\n" ); document.write( "With the wind:
\n" ); document.write( "(1) \"+1176+=+%28+s+%2B+w+%29%2A14+\"
\n" ); document.write( "Against the wind:
\n" ); document.write( "(2) \"+1176+=+%28+s+-+w+%29%2A28+\"
\n" ); document.write( "--------------------
\n" ); document.write( "(1) \"+s+%2B+w+=+1176%2F14+\"
\n" ); document.write( "(1) \"+s+%2B+w+=+84+\"
\n" ); document.write( "and
\n" ); document.write( "(2) \"+s+-+w+=+1176%2F28+\"
\n" ); document.write( "(2) \"+s+-+w+=+42+\"
\n" ); document.write( "Add (1) and (2)
\n" ); document.write( "(1) \"+s+%2B+w+=+84+\"
\n" ); document.write( "(2) \"+s+-+w+=+42+\"
\n" ); document.write( "\"+2s+=+126+\"
\n" ); document.write( "\"+s+=+63+\"
\n" ); document.write( "and
\n" ); document.write( "(1) \"+s+%2B+w+=+84+\"
\n" ); document.write( "(1) \"+63+%2B+w+=+84+\"
\n" ); document.write( "(1) \"+w+=+21+\"
\n" ); document.write( "Plane's air speed is 63 mi/hr
\n" ); document.write( "Wind speed is 21 mi/hr
\n" ); document.write( "check:
\n" ); document.write( "(1) \"+1176+=+%28+63+%2B+21+%29%2A14+\"
\n" ); document.write( "(1) \"+1176+=+84%2A14+\"
\n" ); document.write( "(1) \"+1176+=+1176+\"
\n" ); document.write( "and
\n" ); document.write( "(2) \"+1176+=+%28+63+-+21+%29%2A28+\"
\n" ); document.write( "(2) \"+1176+=+42%2A28+\"
\n" ); document.write( "(2) \"+1176+=+1176+\"
\n" ); document.write( "OK
\n" ); document.write( " \n" ); document.write( "
\n" );