document.write( "Question 811397: Isabella rode her bike at a constant speed. It took her 2 hours to travel 216km with the wind behind her. the return trip was took her 3 hours riding into the wind \r
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Algebra.Com's Answer #488717 by richwmiller(17219)\"\" \"About 
You can put this solution on YOUR website!
r*t=d
\n" ); document.write( "2x=216,
\n" ); document.write( "3y=216,
\n" ); document.write( "x=b+w,
\n" ); document.write( "y=b-w
\n" ); document.write( "b bike speed = 90, w wind = 18, bike with wind x = 108, y bike against wind = 72
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