<PRE><B>Question 536812</B>
Call number of boys = b.&lt;P&gt;
If there were 811 more boys than girls, then call the number of girls b-811.&lt;P&gt;
There were 2481 fewer adults than girls (b-811), so call the number of adults b-811-2481.&lt;P&gt;
The sum of all of these is 10483.&lt;P&gt;
{{{b+(b-811)+(b-811-2481)=10483}}}&lt;P&gt;
Add the b&#39;s and the numbers.&lt;P&gt;
{{{3b-4103=10483}}}&lt;P&gt;
Add 4103 to each side.&lt;P&gt;
{{{3b = 14585}}}&lt;P&gt;
Divide both sides by 3.&lt;P&gt;
{{{b=4862}}}&lt;P&gt;
There are 4862 boys.&lt;P&gt;
There are b-811 = 4862-811 = 4051 girls.&lt;P&gt;
There are b-811-2481 = 4862-811-2481 = 1570 adults.&lt;P&gt;
4862+4051+1570=10483.
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