Question 1032755
r , the rate for 1 laborer.
30r, the rate of 30 laborers.
{{{30r*18=15}}}


The form for the rule would be {{{nR*t=j}}} and the variables have meanings:
<pre>n   number of laborers
r   rate for 1 laborer
t   time of doing any amount of work to produce so much quantity of jobs
j   quantity of jobs</pre>
--
{{{12(r)*t=12}}}


{{{12((15)/(30*18))t=12}}}

{{{(1/36)t=1}}}

{{{t=(36/1)}}}

{{{highlight(t=36)}}}{{{days}}}