<PRE><B>Question 978268</B>
Uniform rate for doing a task:
RT=J to relate rate, time, amount of task or job.


Agents doing work together form an additive rate.  4 workers, rate is 4R.  n workers, rate is nR.


Let r be one-worker rate, and t be the unknown time for 2 workers together.
{{{system(4r*4=4,2*r*t=6)}}}


Solve the system, with the main goal to find value for t.</PRE>