document.write( "Question 1032312: A 15-person road crew is scheduled to finish repairing a highway in 12 days. On the morning of the fifth day, several new workers join the crew and, together, they complete the remaining repairs in 6 days. How many new workers joined the crew? \n" ); document.write( "
Algebra.Com's Answer #647031 by robertb(5830)\"\" \"About 
You can put this solution on YOUR website!
There is a requirement of 15*12 = 180 person-days to finish repairing the highway. Since it has been 4 days that the crew has been working, 4*15 = 60 person-days have already been accomplished. The remaining work is done by 15+x persons in 6 days. Hence, \r
\n" ); document.write( "\n" ); document.write( "60 + 6(15+x) = 180\r
\n" ); document.write( "\n" ); document.write( "==> 6(15+x) = 120
\n" ); document.write( "==> 15+x = 20
\n" ); document.write( "==> x = 5.
\n" ); document.write( "Therefore five new workers joined the crew.
\n" ); document.write( "
\n" );