document.write( "Question 820508: Natasha rides her bike (at a constant speed) for 4 hours, helped by a
\n" ); document.write( "wind of 3 miles per hour. Pedaling at the same rate, the trip back against
\n" ); document.write( "the wind takes 10 hours. Find the total round trip distance she
\n" ); document.write( "traveled. \n" ); document.write( "
Algebra.Com's Answer #493581 by TimothyLamb(4379)\"\" \"About 
You can put this solution on YOUR website!
s = d / t
\n" ); document.write( "d = s * t
\n" ); document.write( "----
\n" ); document.write( "D = (s + 3)4 = (s - 3)10
\n" ); document.write( "4s + 12 = 10s - 30
\n" ); document.write( "6s = 42
\n" ); document.write( "---
\n" ); document.write( "s = 7 mph
\n" ); document.write( "2D = 2( 4(7) + 12 )
\n" ); document.write( "2D = 80
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\n" ); document.write( "answer:
\n" ); document.write( "round trip distance: 80 miles
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