document.write( "Question 347594: The officejet printer can copy a dissertation in 22 min. The Laserjet printer can copy the same document in 8 min. If the two machines work together, how long would they take to copy the dissertion? \n" ); document.write( "
Algebra.Com's Answer #248596 by checkley77(12844)\"\" \"About 
You can put this solution on YOUR website!
1/22+1/8=1/X
\n" ); document.write( "(8+22)/(22*8)1/X
\n" ); document.write( "30/176=1/X CROSS MULTIPLY.
\n" ); document.write( "30X=176
\n" ); document.write( "X=176/30
\n" ); document.write( "X=5.867 HOURS WORKING TOGETHER.
\n" ); document.write( "PROOF:
\n" ); document.write( "1/22+1/8=1/5.867
\n" ); document.write( "(8+22)/22*8=.17
\n" ); document.write( "30/176=.17
\n" ); document.write( ".17=.17
\n" ); document.write( "
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