document.write( "Question 439168: An experienced bricklayer can construct a small wall in 6 hours. An apprentice can complete the job in 12 hours. Find how long it takes if they work together. \n" ); document.write( "
Algebra.Com's Answer #304063 by robertb(5830)\"\" \"About 
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\"x%281%2F6+%2B+1%2F12%29+=+1\"
\n" ); document.write( "<==> x/4 = 1
\n" ); document.write( "==> x = 4 hours working together and starting at the same time.
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