<PRE><B>Question 1207697</B>
Basic Rule: {{{RATE*TIME=WORK}}}


Needed is for N workers each at rate {{{R}}} then
for T time and W amount of work,
{{{NRT=W}}}.


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If 3 people can paint 2 rooms in 4 days, 
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{{{3R*4=2}}}


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how many people are needed to paint 12 rooms in 6 days?
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{{{NR*6=12}}}



Simple set of equations,
{{{system(3*4*R=2,6NR=12)}}}


Divide the second equation by the first equation:
{{{(6NR)/(3*4R)=12/2}}}

{{{N/2=6}}}

{{{highlight(N=12)}}}</PRE>