document.write( "Question 176747: Flying against the jetstream, a jet travels 4410km in 9 hours. Flying with the jetstream, the same jet travels 7280 km in 8 hours. What is the speed of the jet in still air, and what is the speed of the jetstream? \r
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\n" ); document.write( "\n" ); document.write( "I saw this question but it was a little different can you help please thanks.
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Algebra.Com's Answer #131827 by ankor@dixie-net.com(22740)\"\" \"About 
You can put this solution on YOUR website!
Flying against the jetstream, a jet travels 4410km in 9 hours. Flying with the jetstream, the same jet travels 7280 km in 8 hours. What is the speed of the jet in still air, and what is the speed of the jetstream?
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\n" ); document.write( "let x = speed of the jet
\n" ); document.write( "let y = jet-stream speed
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\n" ); document.write( "Write a distance equation dist = time*speed
\n" ); document.write( "9(x-y) = 4410
\n" ); document.write( "8(x+y) = 7280
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\n" ); document.write( "simplify: divide the 1st eq by 8 and th 2nd eq by 9:
\n" ); document.write( "x - y = 490
\n" ); document.write( "x + y = 910
\n" ); document.write( "---------------adding eliminates y, find x
\n" ); document.write( "2x = 1400
\n" ); document.write( "x = 1400/2
\n" ); document.write( "x = 700 km/hr jet speed
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\n" ); document.write( "find y using x - y = 910
\n" ); document.write( "700 + y = 910
\n" ); document.write( "y = 910 - 700
\n" ); document.write( "y = 210 km/hr jet-stream speed
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\n" ); document.write( "you can check solutions in original eq's \n" ); document.write( "
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