document.write( "Question 812522: Three computers can print out a task in 14 min, 21 min, and 42 min, respectively. How long would it take to complete the task with all three computers working? \n" ); document.write( "

Algebra.Com's Answer #489195 by richwmiller(17219) $\"\"$ $\"About$

You can put this solution on YOUR website!
x/14+x/21+x/42=1
\n" ); document.write( "x = 7
\n" ); document.write( "check
\n" ); document.write( "7/14+7/21+7/42=1
\n" ); document.write( "1/2+1/3+1/6=1
\n" ); document.write( "3/6+2/6+1/6=1
\n" ); document.write( "6/6=1
\n" ); document.write( "1=1
\n" ); document.write( "ok\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

\n" );