document.write( "Question 979547: A Swimming pool can be filled 15 hrs if water enters through a pipe alone, or in 23 hours if water enters through a hose a lone. if water entering through both the pipe and the hose, how long will it take to fill the pool 3/5 full?\r
\n" ); document.write( "\n" ); document.write( "x/15+x/23=3/5
\n" ); document.write( "(23x+15x)/23(15)=3/5
\n" ); document.write( "38x/345=3/5
\n" ); document.write( "im stuck here
\n" ); document.write( "

Algebra.Com's Answer #600834 by josmiceli(19441)\"\" \"About 
You can put this solution on YOUR website!
Add the rates of filling
\n" ); document.write( "Rate for pipe:
\n" ); document.write( "[ 1 pool ] / [ 15 hrs ]
\n" ); document.write( "Rate for hose:
\n" ); document.write( "[ 1 pool ] / [ 23 hrs ]
\n" ); document.write( "---------------------
\n" ); document.write( "Let \"+t+\" = time to fill pool \"+3%2F5+\" full
\n" ); document.write( "\"+1%2F15+%2B+1%2F23+=+%28%283%2F5%29%29%2Ft+\"
\n" ); document.write( "\"+1%2F15+%2B+1%2F23+=+3%2F%285t%29+\"
\n" ); document.write( "Multiply both sides by \"+15%2A23t+\"
\n" ); document.write( "\"+23t+%2B+15t+=+3%2A3%2A23+\"
\n" ); document.write( "\"+38t+=+207+\"
\n" ); document.write( "\"+t+=+5.447+\"
\n" ); document.write( "The pool will be 3/5 full in 5.447 hrs
\n" ); document.write( "check:
\n" ); document.write( "\"+1%2F15+%2B+1%2F23+=+%283%2F5%29%2Ft+\"
\n" ); document.write( "\"+.066667+%2B+.043478+=+.6%2Ft+\"
\n" ); document.write( "\"+.110145+=+.6%2Ft+\"
\n" ); document.write( "\"+t+=+.6%2F.110145+\"
\n" ); document.write( "\"+t+=+5.44735+\"
\n" ); document.write( "OK
\n" ); document.write( "
\n" );