document.write( "Question 772965: Margaret and Kiara can finish a certain work in 3 hours. If Margaret works alone, she can finish it in 4 hours. How many hours would it take Kiara to do the work alone? \n" ); document.write( "

Algebra.Com's Answer #471240 by lwsshak3(11628) $\"\"$ $\"About$

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Margaret and Kiara can finish a certain work in 3 hours. If Margaret works alone, she can finish it in 4 hours. How many hours would it take Kiara to do the work alone?
\n" ); document.write( "..
\n" ); document.write( "Margaret and Kiara can finish a certain work in 3 hours.
\n" ); document.write( "Their work rate=1/3
\n" ); document.write( "Margaret works alone, she can finish it in 4 hours.
\n" ); document.write( "Her work rate=1/4
\n" ); document.write( "let x=hours Kiara can finish the job alone
\n" ); document.write( "Her work rate=1/x
\n" ); document.write( "..
\n" ); document.write( "sum of individual work rates=work rate working together
\n" ); document.write( " $\"1%2Fx%2B1%2F4=1%2F3\"$
\n" ); document.write( " $\"1%2Fx=-1%2F4%2B1%2F3\"$
\n" ); document.write( " $\"1%2Fx=1%2F12\"$
\n" ); document.write( "x=12
\n" ); document.write( "hours Kiara can finish the job alone=12 \n" ); document.write( "

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