Question 1052907
Keep rechecking and thinking between this table of data and the description, until you understand how this table shows the description.
<pre>
PERSON    TIME for 1 job

A         x

B         y

A&B      x-8 and y-18
</pre>

You need to understand this:  The combined work rate of A and B is the sum of their individual rates.  The unit for these rates is JOBS/DAY, or WORK/DAYS, whichever way you choose.  Keep on reviewing all of this until it makes sense.



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{{{system(1/x+1/y=1/(x-8),AND,1/x+1/y=1/(y-18))}}}