document.write( "Question 452385: Frank can type a report in 2 hours and James takes 5 hours. How long will it take the two of them
\n" ); document.write( "typing together? \n" ); document.write( "

Algebra.Com's Answer #310988 by josmiceli(19441) $\"\"$ $\"About$

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Add their rates of typing
\n" ); document.write( "Frank's rate:
\n" ); document.write( "( 1 report) / ( 2 hrs )
\n" ); document.write( "James' rate:
\n" ); document.write( "( 1 report ) / ( 5 hrs )
\n" ); document.write( "-----------------
\n" ); document.write( " $\"+1%2F2+%2B+1%2F5+=++1%2Fx+\"$
\n" ); document.write( "Multiply both sides by $\"10x\"$
\n" ); document.write( " $\"+5x+%2B+2x+=+10+\"$
\n" ); document.write( " $\"7x+=+10+\"$
\n" ); document.write( " $\"+x+=+1.43+\"$
\n" ); document.write( "It will take them 1.43 hrs \n" ); document.write( "

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