document.write( "Question 440953: Jimmy can wash his car in 30 minutes his son can wash his car in 120 minutes working together his long will it take them to wash the car? \n" ); document.write( "
Algebra.Com's Answer #304474 by nerdybill(7384)\"\" \"About 
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Jimmy can wash his car in 30 minutes his son can wash his car in 120 minutes working together his long will it take them to wash the car?
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\n" ); document.write( "Let x = time (mins) it takes for both
\n" ); document.write( "then
\n" ); document.write( "x(1/30 + 1/120) = 1
\n" ); document.write( "multiplying both sides by 120:
\n" ); document.write( "x(4 + 1) = 120
\n" ); document.write( "x(5) = 120
\n" ); document.write( "x = 120/5
\n" ); document.write( "x = 24 minutes
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