Question

State what kind of variation you have, then solve the problem. A 15-person road crew is scheduled to finish repairing a highway in 8 days. On the morning of the fifth day, several new workers join the crew and together they complete the remaining repairs in 2 days. How many new workers were there?

Answer 1

==> 6(15+x) = 120
==> 15+x = 20 
==> x = 5.
Therefore five new workers joined the crew.