document.write( "Question 1076954: It takes 7 hours for Isabella to rake leaves by herself, but her brother Matthew can work three times as fast. If they work together, how long will it take them to rake leaves? \n" ); document.write( "
Algebra.Com's Answer #691551 by josgarithmetic(39625)\"\" \"About 
You can put this solution on YOUR website!
Isabella: \"1%2F7\" job per hours
\n" ); document.write( "Matthew: \"3%2F7\"\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Together:
\n" ); document.write( "\"1%2F7%2B3%2F7\"\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"4%2F7\", \"JOBS%2FHOURS\"\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "To find the time for 1 job,
\n" ); document.write( "\"7%2F4\"\r
\n" ); document.write( "\n" ); document.write( "\"highlight%281%263%2F4%29\"\"hours\"
\n" ); document.write( "
\n" );