document.write( "Question 1109459: Nina went to the mall traveling 6mph and returned home traveling 15mph. If the total trip took 7 hours, how long did Nina travel at each speed? \n" ); document.write( "
Algebra.Com's Answer #724449 by josgarithmetic(39627)\"\" \"About 
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\"system%28x%2By=7%2C6x=15y%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"y=7-x\"
\n" ); document.write( "-
\n" ); document.write( "\"6x=15%287-x%29\"
\n" ); document.write( "\"2x=5%287-x%29\"
\n" ); document.write( "\"2x=35-5x\"
\n" ); document.write( "\"7x=35\"
\n" ); document.write( "\"x=5\"
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\n" ); document.write( "\n" ); document.write( "5 hours at 6 mph
\n" ); document.write( "and
\n" ); document.write( "2 hours at 15 mph
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