document.write( "Question 535084: Lisa traveled to her cabin on the lake and back. the trip there took five hours and the trip back took 6 hours. she averaged 45 km/h on the return trip. what was her speed for the trip there? \n" ); document.write( "

Algebra.Com's Answer #351754 by josmiceli(19441) $\"\"$ $\"About$

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Let $\"s\"$ = speed going to lake in km/hr
\n" ); document.write( "Let $\"d\"$ = distance to lake in km
\n" ); document.write( "To lake:
\n" ); document.write( " $\"+d+=+s%2A5+\"$
\n" ); document.write( "Trip back:
\n" ); document.write( " $\"+d+=+45%2A6+\"$
\n" ); document.write( " $\"+d+=+270+\"$
\n" ); document.write( "By substitution:
\n" ); document.write( " $\"+270+=+5s+\"$
\n" ); document.write( " $\"+s+=+54+\"$ km/hr \n" ); document.write( "

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