document.write( "Question 454804: Andrew can paint a room by himself in 8 hours. With the help of Mike, it will only take him 3 hours. How long does it take Mike by him self?
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Algebra.Com's Answer #312249 by nerdybill(7384)![]() ![]() You can put this solution on YOUR website! Andrew can paint a room by himself in 8 hours. With the help of Mike, it will only take him 3 hours. How long does it take Mike by him self? \n" ); document.write( ". \n" ); document.write( "Let x = time (hours) it takes for Mike by himself \n" ); document.write( "then \n" ); document.write( "3(1/8 + 1/x) = 1 \n" ); document.write( "multiplying both sides by 8x: \n" ); document.write( "3(x + 8) = 8x \n" ); document.write( "3x + 24 = 8x \n" ); document.write( "24 = 5x \n" ); document.write( "24/5 = x \n" ); document.write( "4.8 hours = x \n" ); document.write( " |