document.write( "Question 302109: If Sally can paint a hous3e in 4 hours, and john can paint the same house in 6 hours, how long will it take for both of then to paint the same house \n" ); document.write( "
Algebra.Com's Answer #216621 by stanbon(75887)\"\" \"About 
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If Sally can paint a hous3e in 4 hours, and john can paint the same house in 6 hours, how long will it take for both of then to paint the same house
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\n" ); document.write( "Sally's rate: 1/4 house/hr
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\n" ); document.write( "John's rate: 1/6 house/hr
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\n" ); document.write( "Together rate: 1/x house/hr
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\n" ); document.write( "Equation:
\n" ); document.write( "rate + rate = together rate
\n" ); document.write( "1/4 + 1/6 = 1/x
\n" ); document.write( "Multiply thru by 12x to get:
\n" ); document.write( "3x + 2x = 12
\n" ); document.write( "5x = 12
\n" ); document.write( "x = 2.4 hrs (time for both to paint the house when working together)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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