document.write( "Question 634178: I am doing a review for my nursing students at the college where I teach. I am having trouble showing them the steps to solve a problem like below.\r
\n" ); document.write( "\n" ); document.write( "Tim paints a room in 2.5 hours. Bob paints a room the same size in 5 hours. How long would it take them if they painted the room together?
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Algebra.Com's Answer #399402 by jim_thompson5910(35256)\"\" \"About 
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1/2.5 + 1/5 = 1/t\r
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\n" ); document.write( "\n" ); document.write( "10/25 + 1/5 = 1/t\r
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\n" ); document.write( "\n" ); document.write( "10t + 5t = 25 ... Multiply every term by the LCD 25t to clear out the fractions\r
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\n" ); document.write( "\n" ); document.write( "15t = 25\r
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\n" ); document.write( "\n" ); document.write( "t = 25/15\r
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\n" ); document.write( "\n" ); document.write( "t = 5/3\r
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\n" ); document.write( "\n" ); document.write( "t = \"1%262%2F3\"\r
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\n" ); document.write( "\n" ); document.write( "So if they worked together, then it would take them \"1%262%2F3\" hours (or 1 hour, 40 minutes)
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