document.write( "Question 731514: pedro can drive 4 times as fast as luis can ride his bicycle. if it takes luis 3 hrs longer than pedro to travel 36 miles, how fast can luis ride his bicycle?
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Algebra.Com's Answer #447149 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Let $\"+s+\"$ = Luis's speed in mi/hr
\n" ); document.write( " $\"+4s+\"$ = Pedro's speed in mi/hr
\n" ); document.write( "Let $\"+t+\"$ = Pedro's time in hrs to travel 36 mi
\n" ); document.write( " $\"+t+%2B+3+\"$ = Luis's time in hrs to travel 36 mi
\n" ); document.write( "-------------
\n" ); document.write( "Pedro's equation:
\n" ); document.write( "(1) $\"+36+=+%284s%29%2At+\"$
\n" ); document.write( "Luis's equation:
\n" ); document.write( "(2) $\"+36+=+s%2A%28+t+%2B+3+%29+\"$
\n" ); document.write( "--------------------
\n" ); document.write( "(1) $\"+t+=+9%2Fs+\"$
\n" ); document.write( "(2) $\"+36+=+s%2A%28+9%2Fs+%2B+3+%29+\"$
\n" ); document.write( "(2) $\"+36+=+9+%2B+3s+\"$
\n" ); document.write( "(2) $\"+3s+=+27+\"$
\n" ); document.write( "(2) $\"+s+=+9+\"$
\n" ); document.write( "Luis's speed is 9 mi/hr
\n" ); document.write( "check:
\n" ); document.write( "(1) $\"+t+=+9%2Fs+\"$
\n" ); document.write( "(1) $\"+t+=+9%2F9+\"$
\n" ); document.write( "(1) $\"+t+=+1+\"$ hr
\n" ); document.write( "and
\n" ); document.write( "(2) $\"+36+=+9%2A%28+t+%2B+3+%29+\"$
\n" ); document.write( "(2) $\"+36+=+9t+%2B+27+\"$
\n" ); document.write( "(2) $\"+9t+=+9+\"$
\n" ); document.write( "(2) $\"+t+=+1+\"$ hr
\n" ); document.write( "OK\r
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