document.write( "Question 346255: if it takes someone 20 mins to mow a lawn and someone else 15 mins to mow a lawn how long if they both do it together? \n" ); document.write( "
Algebra.Com's Answer #247603 by user_dude2008(1862)\"\" \"About 
You can put this solution on YOUR website!
1/20+1/15=1/t\r
\n" ); document.write( "\n" ); document.write( "3t+4t=60\r
\n" ); document.write( "\n" ); document.write( "7t=60\r
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\n" ); document.write( "\n" ); document.write( "t=60/7
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