document.write( "Question 619264: Elena bicycles 8km/h faster than Dennis. In the same time it takes Dennis to bicycle 42km/hr, Elena can bicycle 66km/hr. How many km/hr does Dennis bicycle. How many km/hr does Elena bicycle. \n" ); document.write( "

Algebra.Com's Answer #389505 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
The problem is misstated. 42 km/hr should be 66 km and
\n" ); document.write( "66 km/hr should be 66 km.
\n" ); document.write( "With that understood,
\n" ); document.write( "Let $\"+t+\"$ = the time it takes Dennis to bicycle 42km
\n" ); document.write( " $\"+42%2Ft+\"$ = Dennis's speed
\n" ); document.write( " $\"+42%2Ft+%2B+8+\"$ = Elena's speed, and
\n" ); document.write( " $\"+66%2Ft++\"$ = Elena's speed also
\n" ); document.write( "----------------------
\n" ); document.write( " $\"+42%2Ft+%2B+8+=+66%2Ft+\"$
\n" ); document.write( " $\"+42+%2B+8t+=+66+\"$
\n" ); document.write( " $\"+8t+=+24+\"$
\n" ); document.write( " $\"+t+=+3+\"$
\n" ); document.write( " $\"+66%2Ft+=+66%2F3+\"$
\n" ); document.write( "Elena's speed is 22 km/hr
\n" ); document.write( "------
\n" ); document.write( "check:
\n" ); document.write( "Dennis's speed = $\"+42%2F3+\"$
\n" ); document.write( " $\"+42%2F3+\"$ = 14 km/hr
\n" ); document.write( "OK\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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