document.write( "Question 291776: A sink can be filled in 3 minutes. Suzi is filling and draining the sink at the same time. In 15 minutes the sink starts to overflow. How many minutes does it take to drain the sink? \n" ); document.write( "
Algebra.Com's Answer #210997 by ankor@dixie-net.com(22740)\"\" \"About 
You can put this solution on YOUR website!
A sink can be filled in 3 minutes. Suzi is filling and draining the sink at the same time.
\n" ); document.write( "In 15 minutes the sink starts to overflow.
\n" ); document.write( " How many minutes does it take to drain the sink?
\n" ); document.write( ":
\n" ); document.write( "Let x = time required to drain the sink
\n" ); document.write( ":
\n" ); document.write( "Let the full sink = 1
\n" ); document.write( ":
\n" ); document.write( "Filling (+) draining(-)
\n" ); document.write( "\"15%2F3\" - \"15%2Fx\" = 1
\n" ); document.write( "multiply equation by 3x
\n" ); document.write( "15x - 3(15) = 3x
\n" ); document.write( "15x - 45 = 3x
\n" ); document.write( "15x - 3x = 45
\n" ); document.write( "12x = 45
\n" ); document.write( "x = \"45%2F12\"
\n" ); document.write( "x = 3.75 minutes to drain a full sink
\n" ); document.write( ";
\n" ); document.write( ":
\n" ); document.write( "Check solution
\n" ); document.write( "\"15%2F3\" - \"15%2F3.75\" =
\n" ); document.write( "5 - 4 = 1
\n" ); document.write( "
\n" ); document.write( "
\n" );